1. "There's a red scarf in the window," said Jill. "I'd like two or three for presents, but do you have it in any other colour?" "Of course. Green and blue, but at different prices," the girl replied. "A red and blue would be two pounds more than a green, a red and a green three pounds more than a blue, and a blue and a green four pounds more than a red." What were the respective prices?

Red two pounds fifty pence, green three pounds fifty pence, blue three pounds.

Red three pounds fifty pence, green four pounds fifty pence, blue three pounds.

Red five pounds, green three pounds fifty pence, blue four pounds.