a) <br /> N <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> O <br /> 0 <br /> O <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> a <br /> 0, <br /> O <br /> O <br /> U <br /> N <br /> O <br /> h <br /> Q <br /> O <br /> U <br /> m <br /> CD <br /> is <br /> d <br /> O <br />