If Amy has no idea which of the three mileage assumptions is most appropriate, what is the recommended decision $($leasing option$)$ using the optimistic, conservative, and minimax regret approaches?

The recommended decision using the optimistic approach is

$---$Select$---$

$.$ The recommended decision using the conservative approach is

$---$Select$---$

$.$ The recommended decision using the minimax regret approach is

$---$Select$---$

$.$