An intergalactic cruiser has two types of guns: a photon cannon that fires a beam of laser light and an ion gun that shoots ions at a velocity of 0.920c relative to the cruiser. The cruiser closes in on an alien spacecraft at a velocity of 0.580c relative to this spacecraft. The captain fires both types of guns.
(a) Obtain at what speed do the aliens see the laser light?
(b) Obtain at what speed do the aliens see the ions approach them?
(c) Find at what velocity do the aliens see the laser light?
(d) Find at what velocity do the aliens see the ions move away from the cruiser?