Fill in the table, graph, then find the displacement and acceleration. t (s) V (m/s)

0 0
1 ?
? 2.8
3 ?
? 5.6
5 ?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.