Problem 4 (20 points):

Estimate rest period for Super-Mario (age =40 years, height = 163 cm, weight = 63 kg) if he performs 15 minutes of heavy carpentry work (steady state heart rate = 98), followed by 20 minutes of moderate assembly work (steady state heart rate = 85) and 10 minutes of load carrying (steady state heart rate = 103). The relationship between the heart rate and oxygen consumption is given in the following table:

Heart rate	O2 consumption
80	1.1
90	1.5
100	1.6
110	2
120	2.1
130	2.6