One of the employee responsibilities to loto is: a. to make certain the equipment may be safely used after a loto has been completed. b. to confirm that all affected employees have been trained c. to shut down any hazardous energy d. to read and understand the assembly diagram of the equipment he or she works on.

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.