Question 3 More registers appears to be a good thing, in terms of reducing the total number of memory accesses a program might require. Using the arithmetic expression S A+B-(C+D support this statement. Hints: First, determine the number of memory accesses necessary using MARIE and the two registers for holding memory data values (AC and MBR). Then perform the same arithmetic computation for a processor that has more than three registers (for example, R1, R2, R3, R4) to hold memory data values.] [6 marks]