1. Considering driving one person's car first, there are three arrangements, namely A( 1, 3)=3, the remaining four people have three jobs, and the rest can be arranged at will. Considering that every job needs people, a job must have two people, so you can choose two people first. There are six kinds of C (2 2,4) =1

2. If two people drive, there are three kinds of C (2,3) = the other three people do three kinds of jobs, which is one kind of A (3,3), so the overall arrangement scheme is C (2,3) × A (3,3) =18.

72+ 18 = 90 species.