The Taylor polynomial of order 2 generated by a twice-differentiable function (x) at x = a is

The Taylor polynomial of order 2 generated by a twice-differentiable function ƒ(x) at x = a is called the quadratic approximation of ƒ at x = a. Find the 

(a) Linearization (Taylor polynomial of order 1) 

(b) Quadratic approximation of ƒ at x = 0.

ƒ(x) = e^{sin x}