Answer:
magnitude: 100 N direction: east
Explanation:
The electrostatic force between two charges is given by

where
k is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the charges
In this problem, we have



Substituting into the equation, we find the magnitude of the force

Concerning the direction, let's notice that:
- Both charges are positive, so the force between them is repulsive
- The charge q1 is west of the charge q2
- So, the force applied by q1 on q2 must be to the east (away from charge q1)