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1. What does this program print? ``

python
nums = [4, 5, 6]
for x in nums:
    x += 1
total = 0
for x in nums:
    total += x
print(total)

``

15181221

2. What does this program print? ``

python
stock = {"pear": 3, "apple": 7, "fig": 0}
total = 0
for n in stock.values():
    total += n
print(total)

``

71030

3. The loop below raises an error. What is the bug? ``

python
stock = {"pear": 3, "apple": 7, "fig": 0}
total = 0
for n in stock:
    total += n
print(total)

``

Use for i in range(len(stock)):, because a dict can be indexed by positionChange total = 0 to total = '', because the keys are textfor n in stock gives the keys, which are text, so total += n adds text to a number; loop over stock.values() insteadAdd break inside the loop, because a for loop over a dict never ends

4. This program reads numbers until 0 and prints their average. It is run with the input 0 alone. What is the bug? ``

python
total = 0
count = 0
x = int(input())
while x != 0:
    total += x
    count += 1
    x = int(input())
print(total / count)

``

total should start at 1, so the division is never by zeroThe program divides by count without checking that it is not zero, so the input 0 alone raises ZeroDivisionError: division by zeroThe first int(input()) should be inside the loop body, so the sentinel is not readThe loop test should be x == 0, so that the loop runs when the input is 0

5. Which value can a Python for loop not read from directly?

A str such as "tea"A dict such as {"pear": 3}A range(5) objectThe number 5

Iteration forms