29. Estimated values of thermal conductivity of silicon at different temperatures are given in the following table.

(a) Make a plot of k versus T using log scale on both axes.

(b) Curve-fit the data with a second-order polynomial in which and . Once the coefficients

a, b, and c are determined, write an equation for k as a function of . Use this equation for curve-fitting the data. Make a second plot that shows the data points with markers and the curve-fitted equation with a solid line.

(c) Repeat part

(b) using a third-order polynomial.