Is my work correct?

6. Show how you would include the following cost functions, 0:3), in a linear optimization model. Fixed = 0, variable = 10, Fixed = E], variable = 5, Fixed = 1!], variable = 8 to S = 5, then 15. Fixed = 20, variable = 5, Fixed = 14, variable = 4 to S = 5, then 12, 9'5\"wa!" Fixed = 20, variable = 5 to S = I", then 3.