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 $53 million, determine the total cost of the most cost-effective techniques.

ActivityCost, $ScoreTethered Aerostats4.58Boots-on-the-Ground42.152Fence14.212Motion Sensors87Seismic Sensors5.65Drones12.826

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

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

The total cost is $ ....million.