A small but growing advertising business hires a new secretary until now the computers have been directly connected and all the employees have shared a printer while top management hopes their secretary is trustworthy they do not want their secretaries computer fully connected to all other computers just yet what do they need to do

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.