Consider the series 7220 317, n l 2 Its interval of convergence is of one of the forms ((1,1)), (0,, b], [0,, b) or [(1,1)]. a) What is a? b) The series converges at a: = a. True or False? 0 True 0 False c) What is b? d) The series converges at a: : b. True or False? 0 True 0 False