Переставить элементы в обратном порядке решение

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.

Three out of five seniors remain undecided about a college major at the end of their senior year.

Explain how email technologies enable the exchange of messages between users. find out the typical parts of an email address and explain each part.