tolong bantu jawab pertanyaan berikut ini

a.) P = {-5 -4 -3 -2 -1 0 1 2 3 4 5}
Q = {-8 -7 -6 -5 -4 -3 -2 -1 0 1 2}
R = {-2 -1 0 1 2 3 4 5 6 7 8}
S = {-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10}

b.) (P u Q) = {-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5}
(P u R) = {-5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8}
(Q u R) ={-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8}
(P u Q u R) = {-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8}