If a = 60 Cm,b = 80 Cm,Q = −6

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

A) 65 N/C
B) 55 N/C
C) 60 N/C
D) 52 N/C
E) 67 N/C