give the correct answer

Eliza produces couches. She is currently producing 136 couches per month, has 11 employees, and has an average total cost of $725 per couch. She pays each worker $1370 per month and the materials for each couch cost $217. Assume that the wages and cost of materials per couch remain constant, even if the quantity of production changes. Then Eliza hires one more worker, her output increases, and her average total cost changes to $694. Calculate the marginal product of the new worker. an way need