13. [-/8.05 Points] DETAILS AUFEXC4 2.3.053. MY NOTES ASK YOUR TEACHER Use set notation to describe the shaded region. You may use any of the following symbols: A, B, n, U, and '. Keep in mind that the shaded region has more than one set description. U OAnB OAUB O BUA' O AnB' 14. [-/8.05 Points] DETAILS AUFEXC4 2.1.048. MY NOTES ASK YOUR TEACHER Use set-builder notation to write the following set. {1, 2, 3, 4, 5, . ..} O { x | x E D } O { x | XER } O { x | XEW } O { x | XEN} O none of these18. [-/8.05 Points] DETAILS AUFEXC4 1.2.009. MY NOTES ASK YOUR TEACHER Use the given oth term formula to compute the first five terms of the sequence. a = 5n- - 2n = = = DA =