Chapter 16, Problem 4CS

Use regression on the original date to obtain a model of the form

$V\left(t\right)=P\sin \left(\pi t/6\right)+Q\cos \left(\pi t/6\right)+Bt+C{x}_1+D{x}_2+E,$

Where

$x_1=\{\begin{array}{l}1\text{ if }t=11,23,35,\mathrm{\dots }\\ 0\text{ if not}\end{array}$ and $x_2=\{\begin{array}{l}1\text{ if }t=6,7,18,19,\mathrm{\dots }\\ 0\text{ if not}\end{array}$

As discussed in the text. Graph the resulting model together with the original data. (Round model

Coefficients to four significant digits.) (Use two additional columns for the independent variables: one showing the values of $x_1$ and the other $x_2$.)