Define t$-$vector

$t=?$

Invalid use of operator.

Define $y-$vector

Part $($a$)$

Plot results $($should have $3$ plots total$)$

figure;

plot $(??)$;

title$(\text{'}??\text{'})$

Part $($b$)$

Plot results as data points only and as data points with line.

figure $\%$creates another figure window plot $(??)$ ;

title$(\text{'}??\text{'})$