HELP!!!!!!! Graphs of piecwise Functions

Answer:
f(0) = 0 + 4 = 4
f(6) = 8
Step-by-step explanation:
f(0) = 0 + 4 = 4
f(6) = 8
find the x value in the ranges to the right of the equations.
when you find the x use this equation.
plug the x into the equation and solve.