What are two potential challenges when connecting with people from different cultures using collaborative software?
A. People may use different types of computers and screens.
OB. People may have pets that wander into the room during
videoconferencing.
C. People may have different preferences for communicating and
meeting.
D. There may be a language barrier between users.

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.