Exercise $6\mathrm{.}16$ The high$-$level function strcpy $($string copy$)$ copies the character string $src$ to the character string dst$.($a$)$ Implement the strcpy function in RISC$-$V assembly code. Use to for i$.($b$)$ Draw a picture of the stack before, during, and after the strcpy function call. Assume sp$=0$xFFC $000$ just before strcpy is called.