Ryan and Janelle are each driving from a different location to meet at Mammoth Lakes. When they each stopped for lunch they called each other on their cell phones. Ryan had traveled $245$ miles in $3\frac { 1 } { 2 }$ hours. Janelle had driven $260$ miles in $4$ hours.

1. How fast was each person driving?

   Hint (a):

   For each driver, divide the miles they had driven by the amount of time they had been driving. This will give you their speed.

   Answer (a):

   Janelle had been driving at $65$ miles per hour, since $260$ miles divided by $4$ hours is equal to $65$ miles in each hour.
   Can you find Ryan's speed?

2. If Janelle originally started $575$ miles from Mammoth Lakes and continues traveling at the same rate (from part (a)), how many more hours will it take her to arrive at her destination?

   Hint (b):

   Janelle has $315$ more miles to drive. How long will it take to drive $315$ miles at $65$ miles per hour?