Please help with this part!

$($c$)$ The following functions are the same mathematically, but very different in terms of their impact on the relevant MathVector. The addition of vectors is defined as follows.

$($x$1,$x$2,$x$3,...,$xN$)+($y$1,$y$2,$y$3,...,$yN$)=($x$1+$y$1,$x$2+$y$2,$x$3+$y$3,...,$xN $+$yN$)$

$$ void shiftBy$($MathVector$)$ should change the implicit parameter by adding to each of its values the corresponding value of the other vector.

$$ static MathVector add$($MathVector$,$ MathVector$)$ should leave the input vector un$-$ changed and return $($a reference to$)$ a newly created MathVector whose values are obtained by performing the addition of vectors.

You do not need to worry about a user attempting to add vectors of different dimensions.