A study evaluated the sensitivity and specificity of 6 home pregnancy tests using 80 pregnant women. The women collected urine for testing on the day of the missing menses and 3 days after the missing menses. The number of women with positive results is shown below. Pregnancy Test Positive test on the day of missed menses Positive test 3 days after missed menses First Response Manual 77 80 First Response Digital 77 80 EPT Manual 42 64 EPT Digital 54 69 Clearblue Easy Manual 54 70 Clearblue Easy Digital 41 67 a. What measure(s) can you calculate from these numbers