Consider functions () = =1 (= ( 1) 1 , for 1) and () = ( 1).

(a) Compute the first derivative () of function () represented as summation.

(b) What is the value of () for = 1 and 1?

(c) Compute the first derivative () of function ().

(d) Compute the first derivative (() ()) of function () () represented as summation.

(e) What is the ( 2) derivative of () computed at = 1.