Let f(x) = r + 5r + 2. (a) True or False: f(x) has at least one attractive fixed point. (b) True or False: f (r) has at least one repelling fixed point. (c) True or False: f(x) has at least one attractive periodic point of period 2. (d) True of False: f (x) has at least one repelling periodic point of period 2