Series can be used to study integrals that cannot be compute directly. Find a representation of (a) The Fresnel integml C(x) is defined to be CQ:) CIT). e dt. Find a series representation of (b) The error function erf(x) is defined to be erf(r) erf(x). The function C(x) is used in optics as well as highway, railway, and roller coaster design. The error function erf(x) is very important in probability and statistics. On the side, you should think about how one would compute the above integrals "directly".