PLEASE HELP ME
A major shoe company is determines that to minimize costs, C for producing shoes is modeled by C = .1s2 - 2s +25. C is the total cost in billions of dollars and s is the number of units made in millions.



a) Find how many shoes (in millions)the company is able to produce while minimizing the cost.

b) Then determine the lowest cost (in billions) the company is able to achieve.