Refer to the stock market quote in Table 8 -1. a. What was the closing stock price for American Software on February 21, 2020? b. What was the percentage change in IGM Biosciences stock price from February 20, 2020, and February 21, 2020? c. How many shares of Dropbox stock were traded on February 21, 2020? (For all requirements, round your answers to 2 decimal places. (e.g., 32.16)) Note: Includes common stocks, ADRs, and REITs listed on NYSE, Nasdaq, or NYSE American with a prior day close of $2 a share or higher and volume of at least 50,000 . Source: The Wall Street Journal Online, February 21, 2020, www.wsj.com