Two point charges are located on the x-axis of a coordinate system. Load #1 is +3nC and is 40 centimeters (40 cm) to the right of the origin. Load #2 is -5nC and is 20 centimeters (20 cm) to the left of the origin.

a) What is the force (including magnitude and sign) exerted by charge #1 on a charge #3 of -8nC located at the origin of the coordinate system? Indicate whether this force is one of repulsion or attraction.

b) What is the force (including magnitude and sign) exerted by charge #2 on load #3 of -8nC located at the origin of the coordinate system? Indicate whether this force is one of repulsion or attraction.

c) What is the total force (including magnitude and sign) exerted by both charges on load #3 of -8nC located at the origin of the coordinate system? Indicate whether this total force is one of repulsion or attraction.