Free points i got the answer

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.

Whose task it is to ensure that the product flows logically from one step to another?

Which view in a presentation program displays a split window showing the slide in the upper half and a blank space in the lower half?