PLEASE HELP!! Computer science test

See Explanation

Explanation:

Given

The attached function

What the recursion does is that; it adds up individual digits from N to 0

Solving (a): Each output when N = 6

For N = 6.

The function returns the following values:

f(6) = 6

Then: 6 + f(5)

Then: 6 + 5 + f(4)

Then: 6 + 5 + 4 + f(3)

Then: 6 + 5 + 4 + 3 + f(2)

Then: 6 + 5 + 4 + 3 + 2 + f(1)

Then: 6 + 5 + 4 + 3 + 2 + 1 + f(0)

Then: 6 + 5 + 4 + 3 + 2 + 1 + 0 = 21

Solving (b): The output when N = 7

Using the same process in (a) above.

The output is 28

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