Determine whether the given relation is reflexive, symmetric and transitive: C is the circle relation on the set of real numbers: For all x y Element R x C y x^2 + y^2 = 1. D is the "divides" relation on Z^+: For all positive integers m and n m D n m|n. Define a relation Q on R as follows: For all real numbers x and y x Q y x - y is rational. Let A he the set of all strings of a s and b's of length 4. Define a relation R on A as follows: For all s. t Element A. s R t s has the same first two characters as t. Let A he the set of all strings of 0's. l's and 2's of length 4. Define a relation R on A as follows: For all s. t Element A. s R t the sum of the characters in v equals the sum of the characters in t. Let A be the set of all English statements. A relation I is defined on A as follows: For all p q Element A. p | q p rightarrow q is true