Equilibrium No. Of Hours Worked

It seems just that little bit harder everyday to get that extra bit done. Life has never been so slow yet so fast.
Too slow: i just wanna get this entire thing done and over with.
Too fast: bloody day of reckoning draws closer everyday.

New Theory:
(i) Equilibrium no. of hours worked is the intersection of your anxiety curve (upward sloping) and your fatigue curve (downward sloping).
(ii) Plot time left to the first day of exam on the y-axis and no. of hours worked per day on the x-axis.
(iii) Derive your equilibrium level of hours worked.
(iv) This theory is really the result of spending too many hours with my micro and macroeconomics notes
(v) My next theory will be an earth-shattering, noble-prize winning hypothesis about how exams are really a waste of time.