how long does it take light traveling from the sun at 3." x 10^8 m/s to reach Jupiter, which is about 780 x 10^6 km away?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

Idon’t quite understand this problem

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted