Please answer the question in order please.

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

What does the relationship between the mean and median reveal about the shape of the data