(24 pts, 4 pts each) In each of the following problems, is the micro-instruction or micro- instruction sequence possible for the simple computer we discussed in the class? If not, replace it with a new micro-instruction or sequence which performs the same intended function [AC]-> MAR [[MAR]] X a. b. [[MARI] PC [[MARI] MDR [MDR] MAR c. d. [MDR] + [X] X e. [MAR] + [PC]-> MAR [IR] X [X] + [AC] AC [AC] MAR f. (24 pts, 4 pts each) In each of the following problems, is the micro-instruction or micro- instruction sequence possible for the simple computer we discussed in the class? If not, replace it with a new micro-instruction or sequence which performs the same intended function [AC]-> MAR [[MAR]] X a. b. [[MARI] PC [[MARI] MDR [MDR] MAR c. d. [MDR] + [X] X e. [MAR] + [PC]-> MAR [IR] X [X] + [AC] AC [AC] MAR f