2. Write C++ statement to evaluate each of the following algebraic expressions. Use parenthesi wherever needed. Assume all the variables are already declared and initialized. D = b2-4ac, input variables are a, b and c ' input variable is x = +2c+3 iii) F =2C + 32, assume C and F to be floating point variables, and C is known input iv) Z = 2 +-, x and y are known inputs v) C = cos-1 (dtb_ 3xty 2ab