I just need to reassurance, would they both be negative?

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

Photons with the highest energy have the longest period

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.