1. Internal Rate of Return (IRR)
   1. Suppose you are considering switching fields from public health and find the following salary schedule:

	Year 0	Year 1	Year 2
Public Health Professional	-5	5	5
Butler	1	1	1

Write down (but do not solve) the equation(s) to find the internal rate of return of becoming a butler as opposed to a public health professional. You may use two equations to avoid tedious substitution if youprefer.

After some algebra you find the IRR to be 22%. After some soul searching you find your own interest rate is 20%. Which profession do you choose and why? (Assume both professions provide equal job satisfaction and ignore sunk costs such as studying for the exam you are currently taking.)