Diketahui himpunan-himpunan berikut. S = {x | x < 10, x

Diketahui himpunan-himpunan berikut. S = {x | x < 10, x bilangan cacah} P = {x l x < 9, x bilangan ganjil} Q = {x | x <= 4, x bilangan asli} R = {x | x <= 10, x bilangan kuadrat} Tentukan: a. (P n R) U Q, b. P^C U (R U Q), dan c. (Q - R) n P.