If Barbara Guarin is single and in the 28% tax bracket, calculate the tax associated with each of the following transactions. (Use the IRS regulations for capital gains in effect in 2008.) a. She sold stock for $1,200 that she purchased for $1,000 5 months earlier. b. She sold bonds for $4,000 that she purchased for $3,000 3 years earlier. c. She sold stock for $1,000 that she purchased for $1,500 15 months earlier.