$\%$We start by declaring our variable.

syms $t$

$\%$Input position as a function of time and compute velocity as a function of time.

$y(t)=$;

$v(t)=$;

$\%$What equation do you need MATLAB to solve to find the value of $y$ max?

eqn$1=$;

$\%$What are you solving that equation to find?

TimeVisZero $=$ double$(????)$

$\%$Finally, how do you use that solution to find $y$ max?

Y$\_$max $=$ double$(????)$

$\%$What equation do you need to solve to find the time when the rock returns to its starting point?

eqn $2=$;

$\%$Solve that equation.

TimeYatStart $=$ double$(????)$

$\%$What equation do we need to solve to find $t$ when $y=0?$

eqn$3=$;

$\%$Solve that equation.

TimeYisZero $=$ double$(????)$

$\%$What is the velocity when $y=0?$

VwhenYisZero $=$ double$(????)$

$\%$You need to plot $y(t),v(t),$ and acceleration vs time, so you need to compute $a(t).$

$a(t)=$;

$\%$Now to plot the three functions in that time interval, i$.$e$.,[0?????????]`$

fplot$(????)$