A rectangular bar is used as a beam carrying a concentrated load of 5500 lb at the middle of its 60 inch length. The cross section is 2 inches wide and 6 inches hight(vertical). Compute max shear stress that occurs in the bar near the load at the following points:
A. Bottom of bar
B. Top of bar
C. Neutral axis
D. 1 inch above bottom
F. 2 inches above bottom