I:$13-27-$William owns two appreciated assets, land and a building, which have been used in his trade or business since purchased in $1990.$ If he sells the two as$-$sets to his $100\%-$owned corporation, will William have to recognize any ordinary income? Explain.

I:$14-28-$Taxpayers are permitted to contribute money to qualified retirement plans and receive very favorable tax benefits. Congress has provided further incentives to contribute money to such plans by enacting the Qualified Retirement Savings Contributions Credit.

a$.$ Why did Congress enact this credit when such contributions already receive favorable tax treatment?

b$.$ Briefly describe how the credit is computed