12. Determine whether the following series is absolutely convergent , conditionally convergent or divergent, state clearly the test you have used in each problem (16 marks) (a) n = 2 In(In n) 2 (b) E( , ) " n= 1 (c) too E (20-131-" cosn) 1 = 1 (d) n = 1 ( 2n ) !)