Suppose you are holding the market portfolio shown in the table, , and have invested $12,000 in Stock C. a. How much have you invested in Stock A ? b. How many shares of Stock B do you hold? c. If the price of Stock C suddenly drops to $4 per share, what trade in Stock C do you need to execute to maintain your portfolio at the same proportions as the market portfolio? a. How much have you invested in Stock A ? The amount that you have invested in Stock A is $. (Round to the nearest dollar.) Data table (Click on the icon located on the top-right corner of the data table below in order to copy its contents into a spreadsheet.)