4. Give an equation for the second Bézier segment $P ^ {(2)} (t)$ of the relaxed uniform cubic spline curve in R$^ 2$ that interpolates the data points $(3,0)$, $(5,3)$, $(3,5)$, $(0,3)$. (Thus $n = 3$. Your answer should be an explicit equation that could be used on a computer, but it does not have to be simplified algebraically. Treat $P ^ {(2)}$ as a function on $0 \leq t \leq 1$.)