Suppose that you are buying a car for $$50,000,$ including taxes and license fees. You saved $$10,000$ for a down payment. The dealer is offering you two incentives:

Incentive A is a $$5000$ off the price of the car, followed by a five$-$year loan at $7\mathrm{.}39\%.$

Incentive B does not have a cash rebate, but provides free financing $($no interest$)$ over five years.

What is the difference in monthly payments between the two offers? Which incentive is the better deal?