(1) Find the derivatives of the following functions.

(a)   


(b)  




(c)  

(2)   In this problem,  f  and g are functions satisfying the following table.    

x
3	5	-2	5	7
5	3	-1	12	4

  (a) Suppose .   Find .

(b) Suppose .    Find .

(3) Find the slope of the tangent line to the graph of     at the point where  .