Speedometer readings for a vehicle $($in motion$)$ at $3-$second intervals are given in the table.

$\backslash$table$[[t($sec$),v($ft$/$s$)],[0,28],[3,30],[6,25],[9,20],[12,26],[15,27]]$

Estimate the distance traveled by the vehicle during this $15-$second period using the velocities at the beginning of the time intervals.

distance traveled ~~ $$ feet

Give another estimate using the velocities at the end of the time periods.

distance traveled as $$ Teet