Problem 6. Let ? = {?, ?, ?, ?}. Define ? on ? as follows: ? = {(?, ?), (?, ?), (?, ?), (?, ?), (?, ?)} (a) Find the reflexive closure of R.

Consider the given predicate functions. P(n): "n is a prime number" E(n): "n is an even number" P and E both have domain = {nZ:n>1} Identify the TRUE statement(s). Explain your answer. I. En(E(n)^P(n)) II. Vn(E(n)VP(n)) III. \n(→E(n)→ P(n)) IV. En(-P(n)→→E(n)) O II only O I only O I and II only O II and III only O III only O I and IV only SO IV only O none

(herefore ur urlne Find the domain of the funcion In Cin (-2x* 2+ Sx thll

Let ? = {1, 2, 3, 4, 5, 6, 7} and define a relation ? ⊆ ? × ? by? = {(1,1), (1,2), (1,3), (2,3), (7,1), (7,2), (7,3), (4,5), (4,6), (5,6), (5,5)}Determine (yes or no) whether ? has the following properties (no justification is required).