1. Translate function foo() in the following C code to RISC-V assembly code. Assume function bar() has already been implemented. The constraints/tips are: 1) Allocate register s1 to sum, and register s2 to i. 2) There are no load or store instructions in the loop. If we want to preserve values across function calls, place the value in a saved register before the loop. For example, we keep variable i in register s2. 3) Identify the registers that are changed in function foo() but should be preserved. Note that the callee, bar(), may change any temporary and argument registers. 4) Save registers at the beginning of the function and restore them before the exit. Your code should follow the flow of the C code. Write concise comments. Clearly mark instructions for saving registers, loop, function calls, restoring register, etc. // prototype of bar // the first argument is an address of an integer int bar(int a[], int i); int foo(int d[], int n) { } int sum = 0; for (int i = } return sum; 0; i