Use the following relation on the set {1,5,6,8}: r = {(1,1), (1,5), (1,6), (1,8), (5,1), (5,5), (6,1), (6,8), (8,1), (8,6), (8,8)}
6. draw the arrow diagram and the matrix representation for the relation r (4 points): state whether relation r is reflexive, transitive, symmetric, or antisymmetric (4 points).

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total