Help me with "library tactician"please

type or paste code here
```def commandSoldier(soldier, soldierIndex, numSoldiers):
    angle = Math.PI * 2 * soldierIndex / numSoldiers
    defendPos = {"x": 41, "y": 40}
    defendPos.x += 10 * Math.cos(angle)
    defendPos.y += 10 * Math.sin(angle)
    hero.command(soldier, "defend", defendPos);

# Find the strongest target (most health)
# This function returns something! When you call the function, you will get some value back.
def findStrongestTarget():
    mostHealth = 0
    bestTarget = None
    enemies = hero.findEnemies()
    # Figure out which enemy has the most health, and set bestTarget to be that enemy.
    if enemies.health<100:
        mostHealth=enemies.health
        bestTarget=mostHealth
    # Only focus archers' fire if there is a big ogre.
    if bestTarget and bestTarget.health > 15:
        return bestTarget
    else:
        return None


# If the strongestTarget has more than 15 health, attack that target. Otherwise, attack the nearest target.
def commandArcher(archer):
    nearest = archer.findNearestEnemy()
    if archerTarget:
        hero.command(archer, "attack", archerTarget)
    elif nearest:
        hero.command(archer, "attack", nearest)

archerTarget = None

while True:
    # If archerTarget is defeated or doesn't exist, find a new one.
    if not archerTarget or archerTarget.health <= 0:
        # Set archerTarget to be the target that is returned by findStrongestTarget()
        archerTarget = findStrongestTarget()
    
    friends = hero.findFriends()
    soldiers = hero.findByType("soldier")
    # Create a variable containing your archers.
    archers=hero.findByType("archer")
    for i in range(len(soldiers)):
        soldier = soldiers[i]
        commandSoldier(soldier, i, len(soldiers));
    # use commandArcher() to command your archers
    for i in range(len(archers)):
        commandArcher

my code dont seem to work and one of my troops just keep dying
really appreciate if someone could help me

iterate over all enemies using for in findStrongestTarget()

like that?
```def commandSoldier(soldier, soldierIndex, numSoldiers):
    angle = Math.PI * 2 * soldierIndex / numSoldiers
    defendPos = {"x": 41, "y": 40}
    defendPos.x += 10 * Math.cos(angle)
    defendPos.y += 10 * Math.sin(angle)
    hero.command(soldier, "defend", defendPos);

# Find the strongest target (most health)
# This function returns something! When you call the function, you will get some value back.
def findStrongestTarget():
    mostHealth = 0
    bestTarget = None
    enemies = hero.findEnemies()
    # Figure out which enemy has the most health, and set bestTarget to be that enemy.
    for enemy in enemies:
        if enemies.health<100:
            mostHealth=enemies.health
            bestTarget=mostHealth
    # Only focus archers' fire if there is a big ogre.
        if bestTarget and bestTarget.health > 15:
            return bestTarget
        else:
            return None


# If the strongestTarget has more than 15 health, attack that target. Otherwise, attack the nearest target.
def commandArcher(archer):
    nearest = archer.findNearestEnemy()
    if archerTarget:
        hero.command(archer, "attack", archerTarget)
    elif nearest:
        hero.command(archer, "attack", nearest)

archerTarget = None

while True:
    # If archerTarget is defeated or doesn't exist, find a new one.
    if not archerTarget or archerTarget.health <= 0:
        # Set archerTarget to be the target that is returned by findStrongestTarget()
        archerTarget = findStrongestTarget()
    
    friends = hero.findFriends()
    soldiers = hero.findByType("soldier")
    # Create a variable containing your archers.
    archers=hero.findByType("archer")
    for i in range(len(soldiers)):
        soldier = soldiers[i]
        commandSoldier(soldier, i, len(soldiers));
    # use commandArcher() to command your archers
    for i in range(len(archers)):
        commandArcher

yah, but archerTarget doesn’t exist in commandArcher()