Problem 1: What is the corresponding RISC-V assembly code for each of the following C statements? How many RISC-V instructions and how many registers are needed in each case? Assume that the variables a, b and c are assigned to registers x9, x10, and x11 respectively and the base address of arrays A and B are in registers x20 and x21. a. b = = a +B [3] + 4*c; b. c = B[A[b] *2];