ABC Investors began investing in 2019. At December 31, 2019, its investment portfolio was account: Investments - Trading Securities Cost Fair Value Unrealized Gain (Loss) Hilton Common Stock $30,000 $28,000 $(2,000) Marriott Common Stock $20,000 $18,000 $(2,000) Doubletree Common Stock $50,000 $51,200 $1,200 Total portfolio $100,000 $97,200 $(2,800) The Marriott Common Stock was sold for $18,800 on May 2, 2020. The fair values of the securities remaining in the Investments - Trading Securities account at December 31, 2020 were: Hilton $34,500 Doubletree $38,000 2. Show the complete history of the Securities Fair Value Adj. Account in good form. (25 Points)