There are 2 sellers in the market. Jane sells high quality cars that costs her 10,000 dollars and consumers are willing to pay 14, 000 for them. Mary sells low quality cars. She buys them at 6,000 dollars and consumers are willing to pay 10,000 for them. A warrant costs Jane 600t and costs Mary 1200t, where t is number of warranty years. What year warranty should Jane set to prevent Mary from matching her offer?*