Suppose there are two COI classes {Bank of America, Citibank, Bank of the West} and {Shell Oil, Union76, 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.