Can you please explain the answer?

$3 . On July 1 , 2016, Bertram Bryant acquired a 30 percent interest in WindwardCompany , a partnership , by contributing property with an adjusted basis of $5, 000and a fair market value of $12,000 . The property was subject to a mortgage Of$8, 000 , which was assumed by Windward . What is Bryant's basis of his interest inWindward ?J .b .$ 4,000[ .$5, 000" P$6, 400