At a certain distance from a charged particle the magnitude

Question

Compute all given parts of following problem:

Problem: At a certain distance from a charged particle, the magnitude of the electric field is 526 V/m and the electric potential is -3.40 kV.

Part A: What is the distance to the particle?

________________ m

Part B: What is the magnitude of the charge?

________________ µC

Any help I can get on this problem is greatly appreciated! I'm not too familiar with this problem.