This picture shows some of the connections that students in a class have using these connections pick the most direct route you need to send a message from James to mark the message will first go to blank then the message should go to blank2 next to blank3 blank4 will get it next finally the message will go to mark​

Least square fit to polynomial write a function leastsquarefit3pol that solves a linear system of equations to find a least squares fit of a third order polynomial to an experimental data set given as two row arrays. the function leastsquarefit3pol must explicitly solve a set of linear equations and cannot use polyfit. there should be no restriction on the size of the problem that can be solved.