Describe mobile computing software program

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.

Will do anything for brainlest so can you guys me out i will try my best to you out

Explain the importance of html in web page designing in 20 sentences..