John (52 years old) files as a head of household with one 18-year old dependent (qualifying) child. John is eligible to claim a $700 American opportunity tax credit for the year. John did not have any taxes withheld by his employer during the year and he did not make any estimated tax payments. After taking credits into account, what is the amount of John's taxes payable or refund, assuming that his AGI is $26,000 (all from salary) and his taxable income is $8,000

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