(a) The table in Example 7.34 lists only the feasible elementary data contexts for various nodes for Program P7.16. Enumerate all elementary data contexts for nodes 4, 5, 6, and 7. Amongst these,...

(a) The table in Example 7.34 lists only the feasible elementary data contexts for various nodes for Program P7.16. Enumerate all elementary data contexts for nodes 4, 5, 6, and 7. Amongst these, identify the infeasible elementary data contexts. (b) How will the answer to (a) change if the initialization z = 0 is removed and the statement at line 4 is replaced by: 4 input (x, y, z, count);