The optimal risky portfolio can be identified by finding: $($pick all that apply$)$

$1.$ The minimum$-$variance point on the efficient frontier

$2.$ The maximum$-$return point on the efficient frontier and the minimum$-$variance point on the efficient frontier

$3.$ The tangency point of the capital market line and the efficient frontier

$4.$ The line with the steepest slope that connects the risk$-$free rate to the efficient frontier