Identify the main entities of this stock trading system.(companyName,companyHeadQuaterAddress,publicCompany, tradingExchange, companyTrade, traders,...

Identify the main entities of this stock trading system.(companyName,companyHeadQuaterAddress,publicCompany, tradingExchange, companyTrade, traders, brokerage, transactions) 2. Can you think of more entities other than the one described in the data requirements to be added to the stock trading system? 3. Is the ability to model super-type /subtype relationships likely to be important in such environment? Why or why not? 4. Can you think of 4 more rules (other than the one explicitly...