Solve the all parts of given problem:
Problem: Two tiny, spherical water drops, with identical charges of -7.76 x 10-16 C, have a center-to-center separation of 1.09 cm.
Part I: What is the magnitude of the electrostatic force acting between them?
Part II: How many excess electrons are on each drop, giving it its charge imbalance?
Please show your work, so I can understand process. Thank you!