\Arrange the vehicles in descending order according to the altitudes at which they operate. Vehicle Altitude (feet) sailboat 0 submarine -1,500 glider 5,000 airship 3,000 A. sailboat, submarine, glider, airship B. submarine, sailboat, airship, glider C. airship, glider, submarine, sailboat D. glider, airship, sailboat, submarine

Your question is not clear but if you can explain yourself i would be glad to .  just trying to : ))

Electron equations of the given changes are as follow,a)                              cu      →      cu⁺²  + 2e⁻b)                              mg⁺²  +  2 e⁻      →      mgc)                              cl⁻    →      cl  +  1e⁻d)                              s  +  2 e⁻    →      s²⁻e)                                o²⁻      →      o  +  2 e⁻f)                              p  +  3 e⁻    →      p³⁻g)                              fe²⁺    →      fe³⁺  + 1 e⁻h)                              s²⁻    →      s⁴⁺  +  6 e⁻