second after the drop for $6$ sec $,$ as shown. Find the following estimates.

$\backslash$table$[[$t$,0,1,2,3,4,5,6],[$a$,32\mathrm{.}00,19\mathrm{.}41,11\mathrm{.}77,7\mathrm{.}14,4\mathrm{.}33,2\mathrm{.}63,1\mathrm{.}59]]$

a$.$ Find an upper estimate for the speed when $t=6.$

$f\frac{t}{sec}$

b$.$ Find a lower estimate for the speed when $t=6.$

$$ ft$/$sec

c$.$ Find an upper estimate for the distance fallen when $t=3.$

$$