$[5]$ Give a command that refines m$.$ This will be the initialization command$($s$)$ that will run before the while loop begins. Note that the specification of m requires that the invariant I hold after it is run.m L$($c$)[5]$ Give a guard expression g for the while loop such thatIA$-$GWe$40\mathrm{.}2306=50\mathrm{.}06>=0$is valid, i$.$e$.,$ so that I $^-$G f$.$G is$($d$)[2)$ Propose a bound expression $($variant$)$ for the loop.