Santa's Wonderland is an extravagant holiday light display that is open from early November through January each year. The entry fee is $15 per vehicle for up to and including 5 people, with an additional $1.50 for each person over 5. Express this information as a piecewise function of x, where x represents the number of people in the vehicle.

1. What is f(0.35)?
   
   
   
   
2. What is f(-5.2)?
   
   
   
   
3. What is f(10)?
   
   
   
   
4. What is f(-0.5)?
   
   
   
   
5. Express f(x) = |x| as a piecewise function.