Answer:
(a) <em>X</em> = {Bilk, Jas, Piaf, Sydow, Wil}
(b) <em>Y</em> = {Jas, Sydow, Tixo}
Hope that helps.
Your question is hard to follow as you have no punctuation. try again
P = 2(L + W)
P = 136
L = 4W - 7
136 = 2(4W - 7 + W)
136 = 2(5W - 7)
136 = 10W - 14
136 + 14 = 10W
150 = 10W
150/10 = W
15 = W <=== width is 15 m
L = 4W - 7
L = 4(15) - 7
L = 60 - 7
L = 53 <== length is 53 m
I think the answer is 1d.
