Write a function

void multiply$\_$overflow$($uint$32\_$t x$,$ uint$32\_$t y$,$ uint$32\_$t$*$ result$\_$upper, uint$32\_$t$*$ result$\_$lower$)$;

This function should perform the multiplication x $*$ y and store the results in the $64-$bit integer formed by result$\_$upper and result$\_$lower. For example:

uint$32\_$t ru$,$ rl;

multiply$\_$overflow$(2,3,$ &ru$,$ &rl$)$;

$//$ ru $=0,$ rl $=6$

multiply$\_$overflow$(0$x$80000000,2,$ &ru$,$ &rl$)$;

$//$ ru $=0$x$00000001,$ rl $=0$x$00000000$

multiply$\_$overflow$(0$x$05$D$2,0$x$720$AF$4$E$0$

$//$ ru $=0$x$00000297,$ rl $=0$xc$3$c$53$fc$0$