3. Assets A, B. and C constitute an asset group. Asset B is considered to be the principal asset in this group. Asset B has a three-year estimated life and A and C have remaining lives of four years. Data on the expected undiscounted cash flows of the three assets, their book values (carrying values), and their fair values less costs to dispose are shown below: Undiscounted cash flows by year A 0 C 1 $13,000 $00,000 $12,000 2 15,000 00000 10,000 3 12.000 65.000 9.000 4 10.000 6,000 Book value $150,000 5220.000 $20,000 Fair value less disposal costs $65,000 $10,000 $25,000 Required: a. Determine the amount of impairment according to SFAS Nos. 121 and 144. b. What is the amount that each of the assets should be written down? c. What theoretical problems do you see with the application of SFAS Nos. 121 and 144 to asset impairments