Help! Will give will give brainist 1. An airplane flies 1431 miles in 2 hours 15 minutes. What is its average speed in miles per hour?

2. A train travels 76 miles in 1 7/12 hours. What is its average speed in miles per hour?

3. An airplane flies 1914 miles in 2 3/4 hours. What is its average speed in miles per hour?

4. A train travels 102 miles in 2 5/6 hours. What is its average speed in miles per hour?

5. Tracy runs 26.2 miles in 3 hours and 45 minutes. What is her average pace in minutes and seconds?

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⁻