227 Written Homework 9Check Canvas for Due DateSometimes we need to take a derivative more than once. The second-derivative of a functio f(x) is defined to be f''(x)=ddx(f'(x)). In words, the second-derivative is the derivativ of the derivative. (We can also define the third-derivative as the derivative of the secone derivative, and so on for higher-derivatives). You will use the second-derivative for applice tions in MTH 228.For each function below, find the second-derivative of f(x).(a)f(x)=x2(b)f(x)=x2cos(x)