QUESTION 1 Select all the true statements. A multi-threaded program will always perform worse than a single threaded program on a single processor system due to the overhead of creating and destroying threads. b. It is cheaper to create and manage user-level threads than kernel-level threads. c. A program using kernel-level threads will always perform worse than a program using user-level threads. d. Two threads of the same process do not share the register values. e. Two threads of the same process do not share the global variables. QUESTION 2 Calculate the maximum possible speed up using Amdahl's law when a program with 80% parallel component is run on a four processor system. O a. 1.5 b.3 C. 2.5 O d. 2