Solve question and show work please, thank you

Problem 3: Coach Smith has a collection of six basketball trophies, five volleyball trophies, and two tennis trophies. (a) How many ways can Coach Smith arrange the trophies on her shelf? (b) How many ways can she arrange the trophies so that the trophies for each sport are grouped together? (c) How many ways can she choose a group of 4 basketball trophies