Consider the following subsets of Z: P = {x | (∃y)(y ∈ Z and y ≥ 2 and x = 5y)} Q = {x | (∃y)(y ∈ Z and x = 4y)} R = {x | x ∈ Z and |x| ≤ 15} Using set operations, describe each of the following sets in terms of P, Q, and R. You may also use subsets of P, Q, R specified by simple predicates (e.g., {x ∈ R | x is even}) and/or finite sets of integers (e.g., {−10, −4, 0, 4, 10}). a. Set of all multiples of 4 with absolute value |x| ≤ 15 b. {−15,−10,−5, 0, 5, 10, 15} c. {x | (∃y)(y ∈ Z and y ≥ 1 and x = 20y)} d. {−14,−12,−8,−6, −2, 2, 6, 8, 12, 14} e. {x∣ (∃y)(y ∈ Z and x = 5y and ∣x∣ > 15 and x is not divisible by 4}