' you got your answer. Do x except those discus;ed go m m' mu m. 1. It takes 20 ft-lbs of work to stret was the force F(a:) required at (Include units on the answer.) ch a certain spring 5 ft beyond its . each value sc (0 5 a: 5 5) to continue matching? 2. The average t/alfie of the function f (m) = k cos a: over the interval [0, -3f 4 fu- is 3. What is is?