help converting the code to LEGv8 using the defined parameters please

Write the compiled LEGv8 assembly code for the following C Code. Suppose that the base address for array arr is in register X20, a in X0, op in X9, b in X1, and res in X2. Use X2 to return the result for all procedures. long long int fact (long long int a) { long long int c = 1; while (a>1){ c = c *a; --a; return c; long long int power (long long int a, long long int b) { long long int c = 1; while (b>0){ c = c * a; --b; return 0; int max (long long int a, long long int b) { if (a/b) return a; else return b; int main() { long long int arr[4]; long long int a = arr[0]; long long int op = arr[1]; long long int b = arr[2]; long long int res; switch (op) { case 0: res = a +b; break; case 1: a-b; res = break; case 2: res = a*b; break; case 3: res = fact (a) ; break; case 4: res = power (a,b); break; case 5: res = max (a,b); break; default: res = 0; break; arr[3] = res; return 0