Show all work please

1. Answer the following: a. (2 points each) Consider the following sets: A = (16,17,18} B = (16,18, 20,22} Find the following: i AUB ii. AnB ili. [P(AOB)| Note: this is the notation for the cardinality of the power set of the symmetric difference of A and B b. (2 points) Write out the first 4 terms from the following sequence: a, = 20,_ +(-1)" where a =7 c. (2 points) Find an explicit sequence formula that will generate the following sequence: 8, 9, 11, 15, 23