The function u: R R is defined as u(x) = 3x + 11, and the function v: Z R is defined as v(r) = 3r + 11. (a) Find u([3,5)) and v({3,4,5}). (b) Find u((2,7]) and ((2.7]). . Define the r: Zx Z Q according to r(m, n) = 35. (a) Find r({1,2,3} x {-1,0,1}). (b) Find r({}). (c) Find r(D), where D = {3,9,27, 81,...}.