Bob is in the sixth grade. his family does not own a computer, and he really needs one to do his homework. he also wants one so he can play some of the games he hears his friends talking about. his parents realize that he needs a computer, but they really have no need for one and probably will never use it. because they don't know much about computers, they are letting bob do all the research and asked him to find the options that will meet his needs. however, his parents are the ones who will make the final decision on how much to spend and which computer to purchase. in terms of the family purchase roles, which role do bob's parents play?