How can the column settings be accessed?

a) layout tab, page setup group
b) layout tab, paragraph group layout tab,
c) arrange group design tab,
d) document formatting group

a

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.