Help 10 points please

Afarmer has 5 times as many cows as pigs. the farmer only has cows and pigs, and he has 168 animals. how many cows does he have?

There are four paths from the cabin to the lake. and how many ways can you walk from the cabin to the lake back?

In his free time gary spends 7 hours per week on the internet and 13 hours a week playing video games. if gary has 5 hours of free time per day approximately what percent of his free time is spent on the internet and playing video games?