Triggering multiple audio files without overlapping

Hi, I'm a novice to Max MSP but have a project I'm doing for uni that requires me to trigger a number of different files using the keys on a midi keyboard. I just want to know how I can have one file triggered by C2 (for example) then another by d2, then e2 and so on. I hope this had made sense!! Also I want to know if there's a way that I can choose whether or not the files play at the same time or if one stops the other. Hop[e this isn't too much for a first topic!!