United apparel has the following balances in its stockholders' equity accounts on december 31, 2021: treasury stock, $850,000; common stock, $600,000; preferred stock, $3,600,000; retained earnings, $2,200,000; and additional paid-in capital, $8,800,000.

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b