Identify the addressing mode of each of the following instruction 1a. Load R2, [R3] 1b.Load R2, [100] 1c.Move R2, #6 2. Which addressing mode is appropriate for implementing x = 5 high level language statement. If x is held in R1, illustrate your answer. 3. Write an assembly language program to compute the sum of an 1024-element array A. [Use index register and immediate addressing model]