For each code fragment, list the sets of variable values required to execute each assignment statement at least once. Reaching all assignments may require multiple independent executions of the code.

Transcribed Image Text:

a. if (a> 0) else { x-5; if (b < 0) x-7; b. if (a b) { if (c) d) x-1; else x-23 x-x+1; }