1. Determine the equation for the set of points in the xy-plane that are 3 units away from the point (1, 2). 2. Determine the equation for the set of points in the ry-plane that are equidistant from the point (1, 2) and the line x = 7. 3. Determine the equation for the set of points in the yz-plane whose sum of distances from the points (1,2) and (7, 2) is 10. 4. Determine the equation for the set of points in the zz-plane whose difference of dis- tances from the points (1,2) and (7,2) is 4. 5. Determine a set of parametric equations that describe the circle of radius 7 centered at the origin, oriented clockwise, using the domain [0, 107] to traverse the circle exactly once.