3) The function returns a raised to the power of b. A) power(a, b) B) exponent(a, b) C) pow(a, b) D) pow(b, a) 4) Suppose a string is declared as: string S ="REGINA" . What is S.length()? A) 7 B) 4 C) 6 D) 4 5) Which of the following statements is NOT correct? space for A. The bool data type declares a variable with the value either true or false. data B. Internally, C++ uses 1 to represent true and 0 for false. C. The statement bool flag = false; declares a Boolean variable flag and assigns false to it. D. In C++, any nonzero value evaluates to true and zero value evaluates to false. 6) Which of the following is a valid C++ identifier? A. 1stChar B. myObj! C. first char D. bool 7) Given int a, b, c; which of the following assignment statements is NOT valid? A. a = b = 1; B. 9 * a = 5; C. b +=1; D. C = 2% 5; 8) Which of the following statements is a correct C++ translation of mathematic expression 1= 1 && x = 1 | x