Compute all parts of given question:
Question: Al and Bert stand in the middle of a large frozen lake (frictionless surface). Al pushes on Bert with a force of 20 N for 1.6 s. Bert's mass is 110 kg. Assume that both are at rest before Al pushes Bert.
Part A: What is the speed that Bert reaches as he is pushed away from Al?
m/s
Part B: What speed does Al reach if his mass is 88 kg?
m/s
Write your answer in appropriate format and provide references.