22: Let ji and sum? be the values of j and sum before an iteration of the block below. Let j2 and sum2 be the values of j and sum after the iteration While (j sn) Sum sum + Page 5 of 9 HW-6 jj+1 End-while Which equation is correct? a. sum2 sum, (j) b. sum2 sum 2) c. sum2-sum1 + (j1-1 8.8 Recursive definitions 23: S is a set of strings over the alphabet fa, b) and is defined recursively as follows Basis: AES and bES Recursive rules: If x is in S, then bxa E S and axbES Select the set that corresponds to all the strings of length 4 in S a, a C. {baba, abab) d. (bbaa, aabb, baba, abab)