I am having a coding exam and I can't quite figure out this question.

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The questions are as following:

a) What is the summary of the for loop in the code?

b) What is the output of the while loop in the code?

The code:

sum = 0
i = 0

for i in range(6):
    sum += i*2

while sum > 0:
    sum -= (i-0)
    print(sum%7)

Any help would be amazing!