3. (3 points) Suppose there are two COI classes {Bank of America, Citibank, Bank of the West} and Shell Oil, Union'76, Standard Oil, ARCO} in an investment house using Chinese Wall Model. Alice would like to read 4 objects following the sequence a, b, c, d. Assume CD(a)-Citibank, CD(b)-ARCO, CD(c)-Citibank, CD(d)-Standard Oil. Show whether each read is granted and why. 3. (3 points) Suppose there are two COI classes {Bank of America, Citibank, Bank of the West} and Shell Oil, Union'76, Standard Oil, ARCO} in an investment house using Chinese Wall Model. Alice would like to read 4 objects following the sequence a, b, c, d. Assume CD(a)-Citibank, CD(b)-ARCO, CD(c)-Citibank, CD(d)-Standard Oil. Show whether each read is granted and why