I need solve this question of analytical geometry and Calculus II

Questions 1 part 1 Consider the series: [(-1) "on = [(-1)_ n3 + 1 n=1 n=1 a) Is the sequence {bn } increasing or decreasing? Justify your answer. b) Find limn co bn c) Deduce whether the above series is convergent or divergent. Which test did you use? d) Suppose we consider the series En-1(-1)"bn = En=](-1)n n nP42 , where p is a real number. For which value(s) of p is the series absolutely convergent? part 2 Let 5n+2 an = 7n - 3 n=1 n=1 a) Which series can we compare _ ] an to? b) Using the limit comparison test, determine whether this series is convergent or divergent