Use these numbers: q1 = 15.0 nC, q2 = 8.00 nC, and q3 = -6.00 nC. Each side of the triangle measures l = 40.0 cm. Determine the magnitude of the net force acting on q3.
a) 0.69 N
b) 1.38 N
c) 2.07 N
d) 3.45 N