What is the primary cause of signal loss in satellite communication​

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.

How to do this programming flowchart?

Which player type acts on other players? a. killer b. achiever c. explorer d. socializer