In Exercises 57–62, let

{a_n} = -5, 10, -20, 40, . . . ,

{bn} = 10, -5, -20, -35, . . . ,and 

{cn} = -2, 1, - 1/2, 1/4, . . . .

Find the product of the sum of the first 9 terms of {a_n} and the sum of the infinite series containing all the terms of {c_n}.