Write a program to model a simple calculator. Each data line should consist of the next operation to be performed from the list below and the right operand. Assume the left operand is the accumulator value (initial value of 0). You need a function scan_data with two output parameters that returns the operator and right operand scanned form a data line. You need a function do_next_op that performs the required operation, do_next_op has two input parameters (the operator and operand) and one input/output parameter (the accumulator). The valid operators