Write a RISC-V assembly program as shown below:

1, Define two variables var1 and var2 which have initial value 15 and 19, respectively.

2, Print MEMORY addresses of var1 and var2 using syscall.

3, Increase var1 by 1 and multiply var2 by 4.

4 Print var1 and var2 again.

5 Swap var1 and var2 and print them.