not sure what formula to use. do I add the systolic rows together and diastolic rows together . just not sure what to do.

YUBM_13LO/P Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters of mercury (mmHg), for a sample of 10 adults. The following table presents the results. Use a TI-84 calculator to answer the following. Systolic Diastolic Systolic Diastolic 157 103 123 F O 154 119 134 118 115 130 113 116