6. for a prime number p let f, denote the field consisting of 0,1,2,.., p-1 with addition and multiplication modulo p. which of the following quotient rings are

6. For a prime number p let F, denote the field consisting of 0,1,2,.., p-1 with addition and multiplication modulo p. Which of the following quotient rings are fields? (a) E,]/ (+x +1) (b) F]/(+x+1) (c) E,[x]/(x+x+1) [2013