Given that t$=0$:$0\mathrm{.}1$:$1$; y$=$sin$($pi$*$t$)$;$,$ write a single$-$line MATLAB code that

returns the following.

$($a$)$N

k$=1$ tk $($use the built$-$in Matlab sum routine$)$

$($b$)$N

k$=1$ tkyk

$($c$)$N

k$=1$ t$2$

k