math problem

The table lists eight planets that produce galaxium. It also shows the buying and selling arrangements for galaxium among the planets Planet Buys galaxium from Sells galaxium to Alir Alir, Lamy, Tixo All eight planets Bilk Alir, Bilk, Piaf Alir, Bilk, Tixo Jas Alir, Jas, Piaf, Sydow Jas, Tixo Lamy Alir, Jas, Lamy, Piaf Alir, Lamy, Tixo Piaf Alir, Piaf Bilk, Lamy, Piaf, Tixo Sydow Alir, Sydow, Tixo Jas, Sydow, Tixo Tixo All eight planets Alir, Sydow, Tixo, Wil Wil Alir, Tixo, Wil Tixo, Wil Let U be the set of all eight planets. U= (Alir, Bilk, Jas, Lamy, Piaf, Sydow, Tixo, Will Let X" be the set of planets Jas does not sell galaxium to. Let Y be the set of planets Wil sells galaxium to. Find the sets below. Write each answer in roster form or as . (a) x = ( b ) y' = ]