solve p4 indepandly of s5 .

not for s5 : y= ae^bx using to draw the wave

P.4) With the help of the finite difference (forward, central and backward difference) formulas for the first order derivative, calculate the derivative of the function f(x)=xe at the point x=1 with a step length of h=0.1. S.5) Fit a curve at y= according to the table data and using aeba sty. the least squares method