If a and b are integers, and a = 10, b = 30, and if you use the statement a + = b: What is the resulting value of a? a) 10 b) 30 c) 40 d) 20 Which of the following is not a valid variable name? a) x124 b) x_124 c) "x124"d) x In C++, when you divide one integer by another integer, the result is always a) an integer b) a floating point number c) may be integer or float depending on the values of the integers d) none of the above Evaluate the following expression using C++ rule: 8 + 4/5*5 = ? a) 12 b) 10 c) 8 d) None of the above Which of the following is a valid string constant in C++? a) 23.519 b) 'a' c) "Morning" d) Hello What would be the value of I after the loop is complete, i.e, when the condition fails? for(I = 5: I