Can someone please help me with these engineering questions!!

A new machine includes 100 free service hours for the first year. If additional service hours are needed, it will be available for $75 per hour. For the following service hours, what are the average and marginal costs per hour? 75 125 250 A Production Process A has a fixed cost of $340,000 and a variable cost of $145 per unit. Production Process B for the same product has the fixed cost of $1, 250,000 and variable cost of $95.50 per unit. How many units should be produced by Production Process B to be preferred over Production Process A? The sale price is $200 per unit Use Microsoft Excel for this problem and attach the associated Table and graph to your answers: A construction company wants to construct some recreation fields. Construction will cost $245,000 and annual O&M expenses are $90,000. It is estimated that the value of the gained profit is about $185,000 annually. In year 5 another $75,000 will be needed to refurbish the recreation fields. The salvage value is estimated to be $110,000 after 9 years. Draw the cash How diagram