I'm in 1st year university so please keep answering at that level, thanks

Question 4 (15 points) Investing: Lesser-Known Stocks are based on the following information about the stocks of Whitestone REIT, HCC Insurance Holdings, Inc., and SanDisk Corporation Price Dividend Yield ($) (%) WSR (WSR Whitestone REIT) 16 7 HCC (HCC Insurance Holdings, Inc.) 56 2 SNDK (SanDisk Corporation) 80 2 You invested a total of $8,400 in shares of the three stocks at the given prices and expected to earn $248 in annual dividends. If you purchased a total of 200 shares, how many shares of each stock have you purchased