Create a RISC V program for each of the following exercises. Exercise bex$3$a: Ask the user for his name then greet him as per the following dialog: What is your name? John Hello John! Save your solution as a file named bex$3$a$.$ asm for possible future use. Exercise bex$3$b: Create a program that i$)$ asks the user to enter an integer value, ii$)$ asks the user to enter a memory address, and then it iii$)$ stores the entered integer value in the memory at the entered address. The above process continues in a loop until cancelled. Save your solution as a file named bex$3$b$.$ asm for possible future use.Exercise bex$3$c: A simple telephone directory can be constructed by DC assembler commands as follows: $8$ Create a program that i$)$ asks the user to enter a phone or a name, ii$)$ searches the directory, and iii$)$ reports the found entries. The above process continues in a loop until cancelled. The dialog could be as follows: Enter a phone or a name to search for: John John $11111$ Enter a phone or a name to search for: $11111$ John $11111$ Sara $11111$ Enter a phone or a name to search for:N$1$ck Nick $22222$ Nick $33333$ Enter a phone or a name to search for: Cancelled Save your solution as a file named bex$3$c$.$asm for possible future use.