A MA is preparing to calculate a patient's heart rate from an EKG tracing. Which methods should the MA use for this calculation? 1) Count the number of R waves in a 6-second strip and multiply by 10 2) Count the number of P waves in a 1-minute strip and multiply by 6 3) Count the number of QRS complexes in a 30-second strip and multiply by 2 4) Count the number of T waves in a 15-second strip and multiply by 4