Consider the below matrix A$,$ which you can copy and paste directly into Matlab. The matrix contains $3$ columns. The first column consists of Test #$1$ marks, the second column is Test #$2$ marks, and the third column is final exam marks for a large linear algebra course. Each row represents a particular student.

A $=[6485936983527772648554556984966688686269637248699481899971739263421006597597282599645988364851005786745978746256888465867278868675704588847985898076755761607264675777837872616797754261677568100789074898743898281575173607973778267607166694774717858675396728747885680808658907171637954715294665879866938639070776373716883528364679265699159645378706777417275805788877846917944776644597374677087824786767781669157845981608559678260598672586835705779100788110064787168788775787067648896808876648271646796868295948456728560768867767776705677100887810072717644596372978332100536794737065100839469676894777673726656558079756190626771749359751005589888165747393838677838963766689707578927861767088768882747685588275597578867310058737474976773697862737658478297557880636153814948658081727543343560569267851008260858948877986876167578966505583739377757653806061656472536086787962657971755782406482876682777893507965728056657877838486818660776687717282846859737854877157669176665471589271917365759432756488848662784978100835869498082506054100547875746864487977408910080699299895583356551659164886176698065916968898410093$;