20) Given the following Sum function object class: class Sum double sum; public: Sum(double s-0.0) : sum(s) { } double operator() (double num) { return sum += num; } double operator) (void) const f return sum; double rese t (double s = 0.0) { swap(sum, s); returns; } // create // update // access // [re] initialize 1: Show how to use it to calculate the average of the elements in the following array. (What kind of loop would be most appropriate?) (The declarations are normative the initializations are illustrative.) const size_t MAX = 50; long a[MAX] ={10, 14, 12, 8, 10, 6, 9, 13, 7, 11); size_t num as -10; What would be necessary if the programmer wanted to re-use the same function object to average a second array? Say this one: double b[MAX2] 4.4, 9.6, 7.2, 9.4, 6.3, 5.1 size-t num-bs 6