Given this recursive function: unsigned long secret(unsigned long x, unsigned long y) { if(y < 0) throw std::invalid_argument("oops"); if(y == 0) return 1; else return x * secret(x, y - 1); } a) What is the result of calling secret(3, 4)? b) What does this function do / what purpose does it serve? c) Rewrite this function without using recursion (i.e. use loops). It must have identical externally visible behavior.

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Given this recursive function:

unsigned long secret(unsigned long x, unsigned long y)

{ if(y < 0) throw std::invalid_argument("oops"); if(y == 0) return 1; else return x * secret(x, y - 1); }

a) What is the result of calling secret(3, 4)?

b) What does this function do / what purpose does it serve?

c) Rewrite this function without using recursion (i.e. use loops). It must have identical externally visible behavior.

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