x	3	3.1	3.2	3.3	3.4	3.5	3.6	3.7	3.8	3.9
y	20.08	22.2	24.53	27.12	29.96	33.11	36.6	40.45	44.7	49.4

Using cubic splines based on the Lagrange interpolation formula:

i) estimate derivative at x=3.45. Compare with the estimate with derivative of e^x at x=3.45.

ii) Estimate area under the curve from 3.3 to 3.6. Compare with3.33.6exdx