The data $(-1,4),(0,2), (2, -3),(4,-3) $ and $(7,4)$ was gathered as part of an experiment. a. Plot this data. b. Set up a system of equations that can be solved to find the values $a, b$ and $c$ so that $y=$ $a+b x+c x^{2}$ is the best least squares fit for this data. Do not solve the system. CS.JG.088