**PLEASE HELP** After renting an apartment for five years, Todd and Diane purchased a new home on July 1, 2008. On their 2008 joint tax return, they claimed a $4,500 (refundable) first time home buyer credit. Answer the following questions relating to the credit. C. Assuming they sell the home in August 2011 for a $3,900 gain, what amount of credit must they pay back with their 2011 tax return? Credit repaid $