Tabulate the memory accesses required for the complete fetch and execution of the following instruction: a. 18:68f8ldr re, [r7,#12] b. Write a sequence of assembly language instructions to add the contents of the two memory location 0x2000 and 0x2020 and store the result in 0x2040. Write an assembly or C code fragment that turns on a LED connected to pin 4 of Port B if pin 2 of the same port is taken high. The code should continuous monitor the input. What is the address or addresses of the memory location(s) accessed by the last instruction in the following code and is this a write or a read operation'? c. d. Ldr r2, -0x6300 car re, [r2, #10] and the sontentsofthestackpointera Sketch the contents of the stack and the contents of the stack pointer after the execution of the following assembly language sequence. e. ldr sp, -ex4eee ldr r3, 0x123456 Ldr r4, -0x44BB push r3 push r4 Tabulate the memory accesses required for the complete fetch and execution of the following instruction: a. 18:68f8ldr re, [r7,#12] b. Write a sequence of assembly language instructions to add the contents of the two memory location 0x2000 and 0x2020 and store the result in 0x2040. Write an assembly or C code fragment that turns on a LED connected to pin 4 of Port B if pin 2 of the same port is taken high. The code should continuous monitor the input. What is the address or addresses of the memory location(s) accessed by the last instruction in the following code and is this a write or a read operation'? c. d. Ldr r2, -0x6300 car re, [r2, #10] and the sontentsofthestackpointera Sketch the contents of the stack and the contents of the stack pointer after the execution of the following assembly language sequence. e. ldr sp, -ex4eee ldr r3, 0x123456 Ldr r4, -0x44BB push r3 push r4