I need a quick answer please

Q4. Which one of the following statements about deadlock is NOT a necessary condition for it to occur?? A. Must hold all resources condition: Each agent must request all its required resources at once B. Mutual Exclusion Condition: The resources involved are non-shareable C. Hold and Wait Condition: Requesting process hold already resources while waiting for requested resources D. No-Preemptive Condition: Resources already allocated to a process cannot be preempted E. Circular Wait Condition: The processes in the system form a circular list or chain where each process in the list is waiting for a resource held by the next process in the list [1 mark] Q5. Which of the following, CSP themed, statements is INCORRECT? A. A sequence of zero or more events exhibited after the start of a process is known as a trace in CSP B. A CSP failure is a pair consisting of a refusal and a trace C. A CSP process is divergent if it can perform an infinite sequence of events D. For a process P to be termed safe with respect to a specification : traces(P) 2 traces(5) E. Sets of CSP traces are prefix closed [1 mark) Q6. Consider a CSP process P = a + (a + (6 + P)) where a(P) = {a,b) and No repre sents the natural numbers including 0. Which of the following sets describes traces(P)? A. {"> m + Mo} U{" + Ng},{} B. { inca> Ime No} U{ Ine No} C. {nc a, b, a>" me No}u{a"in e No} U{nca.b.a>"\m No}u{"n In No} { Ipe No) E. None of the above [2 marks] Q7. Given the following process: a STOP Dab+ STOP What are its stable failures? A. {(,X)IX S{b}} U{(,X)| X {a,b}} u{(,X)|X S{a,b}} B. {(,X)IX C {b}} U{(,X)|X S{a}} u{(,X) | X S{a,b}} C. {(,X)IX C {a,b}} U{(,X) X S{b}} v{(,X)| X {}} D. {(,X) X S{a}} U{(,X)|XC {b}} U{(,X)|X S{a,b}} E. None of the above (none of the choices, A through D. are CORRECT) [2 marks] Q8. Consider the CSP processes: P= a + (b + (d)) Q = b + d +(c + (e+Q))) How many states does the resulting CSP process R=P [2.b,d}{b.c.d.e) Q have? A. 5 B. 6 C. 7 D. 8 E. None of the above [3 marks)