Which of the following wave types has a wavelength closest to visible light? gamma rays, infrared rays, radio, or microwaves

Can anybody me with this? ? (picture included.)

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island