Drone/Aircraft for medical delivery drone

Hey Guys, My prospect wants the Drone/Aircraft for medical delivery drone, About the mission details, The client would like to design a medical delivery drone, this drone will be used mainly in Africa where some residents are in remote areas, is drone will be waterproof and reach speeds up ranging 100mph, I want it to be able to autopilot it’s self to a designated landing zone where the required medication is needed, I would like for it to also be able to be controlled from command of which it may be 120km away, the drone should be able to sense any instructions and create or adjust a flight plan, it should be visible on airspace.

Apart from this for energy source, the client wanted batteries but in the future look at adding solar panels so that it recharges the battery.

May I get any helping hands here?? looking forward to connecting soon!