28) Write the following compound statements as equivalent simple statements. a) * += 5-2; b) y *= 2*x +5 - 2; c) w += 2*2 + 4; d) x -= 2 + y - t; e) sum += num; 30) Suppose a, b, and sum are int variables and c is a double variable. What value is assigned to each variable after each statement executes? Suppose a = 6, b = 3, and c = 2.2. um sum - static_cast int>(a + b + c); b-C. a; - a; b - C