Steps for question 2 thx

Over the past three years a stock produced annual returns of 4%. -7%, and 12%, respectively. Based on this information, what is the standard deviation for this stock? a. 9.54% b. 7.58% c. 8.03% d. 7.79% e. 5.16% Next Previous Bikes Ltd. is considering whether to begin production of a new line of bikes. The selling price would be $400 per bike, variable costs would be $300 per bike, and fixed costs would be $20,000 per year. The initial investment required is $50,000 for new production equipment. Depreciation would be straight-line to zero over the 5-year life of the equipment. The salvage value is zero and there are no net working capital requirements. The company has a 17% required rate of return. The tax rate is 35%. The company believes that they can sell 1,400 units annually. 1. Suppose you think that the unit sales, sales price, variable cost, and fixed cost projections given above are accurate to within 5 percent. What are the NPV's under both a base case and best case scenario? 2. If only the unit sales vary from the base case, such that unit sales are 1,520 resulting in an NPV of 89,300. How sensitive is NPV to a change in sales units