Please help with the following:

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. O 0,0,... O U= {Alir, Bilk, Jas, Lamy, Piaf, Sydow, Tixo, Wil} Let X be the set of planets Bilk buys galaxium from. Alir Bilk Jas Let Y' be the set of planets Tixo does not sell galaxium to. Lamy Piaf Find the sets below. Write each answer in roster form or as O. Sydow (a) X' = Tixo Wil (b) Y = X 5