int x1: x1 = 3 + 4%5-5: x1 =_ int x(1), z(5): x =_ z = z = z/++x: Now z =_ double a(3.8), z: a =_ z =_ int n(2), y: n =_ y =_ z = (y=a) * 2: Now z =_ Give the output generated by the sets of statements in questions 18-20 (execute these statements in C++ to be sure): float value_1(5.78263): cout