My teacher laid out the problem please help me fill in the gaps

PROMBLEM (2) Similar to HMK: The two charges in the figure below are separated by d:=2.00 . cm . Find the electric potential at (a) point A and (b) point B, which is halfway between the charges. 91:=-15.0 .nC 92:=27.0 . nC (a) VA = EV,= VI+ V2 d d Vizke =-6.743 - 103 V 60.00 B + 4, 42 92 = (1.214 . 104) V VA= VI+V2= (5.39 - 103) v (b) N A VIBE= Ke. 41 TIB V2 B := K . 42 T 2B VB=VIBTV2B= (1.08 - 104) V