This post provides the possible solutions for Chapter 8in Real-Time System by Jane W. S. Liu. The book is available here.
Q.8.1: A system contains five jobs. There are three resources X, Y and Z. The resources required of the jobs are listed below.
J2 : NONE
J3 : [Y;1]
J4 : [X;3 [Z;1]]
J5 : [Y;4 [Z;2]]