please show all work, i need to understand this, textbook not helping

Exercise 1. Let us consider the following preemptive single-instance task set: J2: S2-0, c2 -2, D2-4 a) how many processors do the above tasks set need to execute? b) check the applicability of the EDF-scheduling method. c) draw a game board and check the applicability of the LL-scheduling method. d) check the applicability of the schedulability test 9