Assume the resting heart rates for a sample of individuals are normally distributed with a mean ofBU and a standard deviation of 20. Use the 689599} rule to find the following quantities. a. The relative frequency of rates less than 120 using the 689599? mle is D. (Round to three decimal places as needed.) b. The relative frequency of rates greater than 100 using the 689599? rule is (Round to three decimal places as needed.) c. The relative frequency of rates between all] and 80 using the 68-95-99} rule is (Round to three decimal places as needed.)