Lambda and Functional Tools - General Questions

What is the output of the following code?

sq = lambda x: x * x
print(sq(9))

What is the output of the following code?

from functools import reduce
print(reduce(lambda a, b: a * b, [1, 2, 3, 4]))

What is the output of the following code?

fs = [lambda: i for i in range(3)]
print([f() for f in fs])

What is the output of the following code?

words = ['pear', 'fig', 'banana']
print(sorted(words, key=len))

What is the output of the following code?

for i, ch in enumerate('ab', start=1):
    print(i, ch, end=' ')