During launches rockets often discard unneeded parts a

Question

Compute each part of given problem:

Problem: During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad and accelerates upward at a steady 3.45m/s². When it is 230m above the launch pad, it discards a used fuel canister by simply disconnecting it. Once it is disconnected, the only force acting on the canister is gravity (air resistance can be ignored).

Part I: How high is the rocket when the canister hits the launch pad, assuming that the rocket does not change its acceleration?

Part II: What total distance did the canister travel between its release and its crash onto the launch pad?

Please explain each step clearly with details so that I can follow.