Solve 2.10 and 2.11 step by step but please do not copy from others website

2-10. Differentiate between monopoly, oligopoly, and perfect competition. For which situation are most general economic principles stated? Is a monopoly ever desirable for the economic wel- fare of the public? (2.3) 2-11. A company has established that the relation- ship between the sales price for one of its prod- ucts and the quantity sold per month is approx- imately D 780 IOP units (D is the demand or quantity sold per month, and p is the price in dollars). The fixed cost is $800 per month, and the variable cpst is $30 per unit produced. What number of units, LY, should be produced per month and sold to maximize net profit? What is the maximum profit per month related to the product? (2.3)