Acontractor has two choices for billing a completed job. · $500 flat rate, regardless of the number of hours worked · $20 per hour worked the graph shows the relationship between pay per hour and number of hours worked for both scenarios. what is the solution to this system of equations, and what does it mean to the contractor? a. the solution (0, 20) tells the contractor the minimum amount that can be charged. b. the solution (0, 500) tells the contractor the maximum amount that can be charged. c. the solution (25, 20) tells the contractor the number of hours on a job where the hourly rate is the same for both billing options. d. the solution (20, 25) tells the contractor the number of hours on a job where the hourly rate is the same for both billing options.