A 794 nc charge is located 169 m from a 430 nc point charge

Question

Solve the all parts of following question:

Question: A 7.94 nC charge is located 1.69 m from a 4.30 nC point charge.

Part A: Find the magnitude of the electrostatic force that one charge exerts on the other. N

Part B: Is the force attractive or repulsive? attractive repulsive

I need help to find the magnitude of the electrostatic force that one charge exerts on the other.