For improving cardiovascular fitness, exercise physiologists recommend exercising so your heart rate is in the target zone. The upper and lower limits of this target zone can be represented as a function of two variables: a persons age and resting heart rate (in beats per minute). These limits are found as follows:

Lower limit = (220 - age in years - resting heart rate)0.6 + resting heart rate

Upper limit = (220 - age in years - resting heart rate)0.8 + resting heart rate

Find the upper and lower limits of the target zone for a 20-year-old individual whose resting heart rate is 68 beats per minute. Enter exact answers.

Lower limit =beats per minute; upper limit =beats per minute.