The velocity $v(t)$ in the table below is increasing for $0t12.$

$\backslash$table$[[t,0,3,6,9,12],[v(t),34,35,38,43,48]]$

A$.$ Find an upper estimate for the total distance traveled using $n=4$ subdivisions: distance traveled $=n=2$ subdivisions: distance traveled $=$

B$.$ Which of the two answers in part $($A$)$ is more accurate?

$n=$ is more accurate

$($Be sure that you can explain why?$)$

C$.$ Find a lower estimate for the total distance traveled using $n=4.$ distance traveled $=$