(15 points)We assume that the measured quantity y is a linear function of three independent variables, x1,x2, and x3, i.e., y=b+a11+a22+a33 Nine data points are measured by setting three levels for each parameter, and the data are placed into a simple data array as shown to Table 1, Calculate the y intercept and the three slopes simultaneously, one slope for each independent variable x1, 2, and 3. Table 1 data array