Which of the following is true with regards to writing off the costs of computer and telecommunications expenses on your tax return? a. it's best to depreciate the items over time. b. it's best to expense the purchase during the tax year the purchase was made. c. only 50% of the cost of the items can be written off as a business expense. d. these expenses can't be written off on a personal tax return.

Consider a treasury bill with a rate of return of 5% and the following risky securities: security a: e(r) = .15; variance = .0400 security b: e(r) = .10; variance = .0225 security c: e(r) = .12; variance = .1000 security d: e(r) = .13; variance = .0625 the investor must develop a complete portfolio by combining the risk-free asset with one of the securities mentioned above. the security the investor should choose as part of her complete portfolio to achieve the best cal would be a. security a b. security b c. security c d. security d