(2D Points) Given the power series representation of sinh 3: below, m 1 1 1 'h= 2n+1= _3 _5 sm x U(2n+l)!x x+6x +12x + n: a. Find the power series representation for cosh 1:. Write the formula in sunnnation notation and write out the first few terms of the power series. 1:). Determine the interval of convergence for the power series representation of cosh I you found in part (a)