If a = 60 Cm,b = 80 Cm,Q = −6

If a = 60 cm,b = 80 cm,Q = −6.0 nC,and q = 4.0 nC,what is the magnitude of the electric field at point P?

A) 35 N/C
B) 42 N/C
C) 52 N/C
D) 64 N/C
E) 104 N/C