Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 15. Use the68-95-99.7 rule to find the following quantities.

a. The relative frequency of rates less than 100 using the68-95-99.7 rule is

nothing

.

(Round to three decimal places asneeded.)

b. The relative frequency of rates greater than 85 using the68-95-99.7 rule is

nothing

.

(Round to three decimal places asneeded.)

c. The relative frequency of rates between 40 and 70 using the68-95-99.7 rule is

nothing

.

(Round to three decimal places asneeded.)