Can you please assist me with the problems shown in the attached screenshot?

Figure 21 Find the arithmetic mean of the list of numbers below. 5, 2, 3, 8, and 4 a =] (Simplify your answer.) Figure 22 Find the arithmetic mean of the list of numbers below. 84, 90, 92, 75, 93, 83, 88, 81, 91, and 77 The mean is (Type an integer or a decimal.) Figure 23 Determine whether the finite series is arithmetic, geometric, both, or neither. If the series is arithmetic or geometric, find its sum. 98 E (-1)3k + 1 K = 1 Select the correct choice below and, if necessary, fill in the answer box to complete your choice O A. The given series is arithmetic. Its sum is (Simplify your answer.) O B. The given series is geometric. Its sum is (Simplify your answer.) O C. The given series is both arithmetic and geometric, Its sum is (Simplify your answer.) O D. The given series is neither arithmetic nor geometric