Suppose that x $=$ t$^2$ and y $=$ t$^3$ t$.$ a$)$ Find the values of t where the graph is concave up or down. b$)$ Sketch the graph for the values of t from t $=1$ to t $=2.$ Draw an arrow on the graph to indicate the direction. c$)$ Convert the equations from parametric form to cartesian form. Good Luck! Page $1$ of $1$