Question $4(25$ pts$)$ In a region known for pioneering smart farming technologies, local farmers have started using autonomous agricultural drones to monitor crop health and improve yields. Each drone costs $\backslash (\backslash$$ $25,000\backslash )$ and is expected to be used for $12$ years, covering $20,000$ miles annually during field surveillance and data collection missions. Every $3$ years, the drone requires a new sensor calibration package costing $\backslash (\backslash$$ $3,000\backslash ).$ Regular annual maintenance for the drone amounts to $\backslash (\backslash$$ $700\backslash ).$ The drone's battery system consumes electricity at a cost of $\backslash (\backslash$$ $0\mathrm{.}015\backslash )$ per mile flown. At the end of its $12-$year service life, the drone is projected to have a salvage value of $\backslash (\backslash$$ $2,000\backslash ).$ Given a MARR of $\backslash (7\backslash \%\backslash ),$ what is the cost per mile to own and operate one of these advanced agricultural drones? Use annual worth analysis to determine your answer.