If we have information about workers$$ marginal products, then total and average product can be found by $\_\_\_\_\_\_\_\_\_.$

a$.$

dividing marginal costs by the number of workers

b$.$

summing the marginal values to find the total and dividing it by the number of workers to get the average

c$.$

multiplying the average marginal product by the number of workers

d$.$

summing the marginal values to find the total and multiplying it by the number of workers to get the average