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Portfolio Problem 10 1) Find 72 att = -2 for the parametric curve given below. Write your final answer as a fraction. Show ALL work including the computation of the 2nd derivative. x=1+tz y=t-t3 2) Find the EXACT area inside the closed loop produced from the following parametric curve. Show ALL work. You will need to find a suitable interval for the parameter to see the entire closed loop. Express your final answer as an improper fraction. x = 16t - 25t3 y = t2