Can someone solve all of these for me whoever does gets brainlist and points

1. Jessica bought 4 stamps for $1.48. At this rate how much would 10 stamps cost?

2. Megan makes 36 dollars after 3 hours baby sitting how much could she make if she sat for 8 hours?

3. Madison makes 10 pretzel bites for $7 how many pretzel bites would she have to make to earn $91

Tysm!!