Find the fifth term of a sequence whose first term is 8 and common ratio is 3/2

The table respent two linear functions the equation respented by the first tables is given

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?