A surveyor records the locations of points in a plot of land by means of polar coordinates. In a circular plot of radius 500 feet, stakes are placed at (125, 130°) and (300, 70°), where r is measured in feet. The stakes are at the same elevation.
a. Draw a diagram of the plot of land. Include the locations of the two stakes.
b. Find the polar equation of the line determined by the stakes.