Question 4.Calculate each of the following: \text { a. } f^{\prime \prime}(2) \text { if } f(x)=5 x^{3}-x \text { b. } f^{\prime \prime}(-1) \text { if } f(x)=-2 x^{-3}+x^{2} \text { c. } f^{\prime \prime}(0) \text { if } f(x)=(4 x-1)^{4} \text { d. } f^{\prime \prime}(1) \text { if } f(x)=\frac{2 x}{x-5} \text { e. } f^{\prime \prime}(4) \text { if } f(x)=\sqrt{x+5} \text { f. } f^{\prime \prime}(8) \text { if } f(x)=\sqrt[3]{x^{2}}