Pls answer fast .

Answer me pls is an algorithm that has been coded into something that can be run by a machine.

Octothorpe is another name for what common computer keyboard symbol?

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.