Various techniques have been proposed to curb cross$-$border drug smuggling into a country. The costs of implementing each strategy along a particularly rugged section of the border are indicated below. The table also includes a score that is compiled based on deterrence, interdiction, and apprehension, with a higher score indicating better performance. Determine the technique with the highest and the lowest cost$-$effectiveness ratio. For a budget of $$59$ million, determine the total cost of the most cost$-$effective techniques.

Activity Cost, $ Score

Tethered Aerostats $4\mathrm{.}98$

Boots$-$on$-$the$-$Ground $46\mathrm{.}152$

Fence $15\mathrm{.}212$

Motion Sensors $8\mathrm{.}47$

Seismic Sensors $65$

Drones $13\mathrm{.}626$

The activity with the lowest cost$-$effectiveness ratio is

$($Click to select$)$

$.$

The activity with the highest cost$-$effectiveness ratio is

$($Click to select$)$

$.$

The total cost is $

million.