Answer:
Jamal could use a drawing pad. He could draw things out with a stylus and have it on his PC to manipulate. They cost as little as $40.
Felicia could use a mechanical keyboard. Although these are better for nearly everyone, someone who is doing a lot of typing and needing both speed and accuracy should get one. They start at around $50.
Credence could use a printer to print out work to hand in when needed. A decent one starts at around $100.