why this code is not working

Question

def max(x,y,z):
if x >=y and x>=z:
return x
else if:
y>=x and y>=z:
return y
else:
return z

print(max(4, 7,5))
z = max(8, 5)
print(z)

Answer 1

def max(x,y,z):
if x >=y and x>=z:
return x
# use elif instead else
elif y>=x and y>=z:
return y
# you had bad indentation
else:
return z

print(max(4, 7,5))
#max () required 3 elements
z = max(8, 5, 0)
print(z)

Answer 2

def max(x,y,z):
if x >=y and x>=z:
return x
#you must use condition in one strong "elif"
elif y>=x and y>=z:
return y
else:
return z
#just call function
max(4, 7,5)
#and then you miss one atribut
z = max(8, 5,3)
print(z)

Answer 3

your max() takes three arguments. you give only two here (z = max(8, 5)).
and there's built-in function max(), why don't you use it?
#aaand elif, yes