The average salary of a garbage man (in thousands) from 1985 to 2001 is represented by the function fx=145x+192 where x is the number of years since 1985. Find f(5) and explain what f(5) means in the context of the problem.

Find the value of x when f(x)=1000. Explain what this x value represents in the context of the problem.

Find f(10) and explain what f(10) means in the context of the problem.

Find the value of x when f(x)=1500. Explain what this x value represents in the context of the problem.