3. Don't worry. My wife just puts her feet up and lets me do the work.
Actually, the thing weighs more than 70lbs. It takes us both to get up a hill - sometimes standing. Down hill she keeps trying to grab for the hand brakes (there aren't any in back). I keep threatening to put some brake handles on her bar just as a placebo. The drum brake in the back (yes, drum) is more than adequate to stop the bike.