Problem #2: One type of airway resistance in human lungs can be approximated using the equation 4 marks] R = 8Ln 4 where R is the resistance, L is the length of the airway, n is the gas viscosity, and r is the radius of the airway. (a) True or False: If we consider R as a function of r, then the semi-log plot of R is linear. (b) True or False: If we consider R as a function of r, then the double-log plot of R is linear. (c) If L = 1 and n = 1.79, what is the instantaneous rate of change of R with respect to r when r = 2? Enter your answer numerically, rounded to 3 decimal places if rounding is required. Problem #2(a): Select v Problem #2(b): Select v Problem #2(c): Save Your work has been saved!_(Back to Admin Page) Problem #3: A sample of naturally occurring radioactive material of is decaying exponentially, with an initial amount of 630 [4 marks] units. After 5 years, the amount of radioactive material has decreased to 210 units. (a) How many units of radioactive material will there be after 10 years? (b) What is the half-life of the radioactive material (in years)? Problem #3(a): (A) TO (B) (C) In2 (D) N (E) In 2 (F) In 2 5 In 3 In 3