Using the above diagram as a guide, carry out the following experiment: Place the equilateral triangular glass prism on the drawing paper. Trace the outline ABC of the prism. remove the prism. Draw a line NO such that it makes an angle i = 25º with the normal at point O on side AB fix two pins \(R_1\) and \(R_2\) vertically on line N0. Replace the prism on its outline; place the reflecting surface of the plane mirror in contact with the face AC of the prism; looking through the face BC of the prism, fix two other pins at \(R_3\) and \(R_4\) such that the pins appear to be in a straight line with the images of the pins at \(R_1\) and \(R_2\); remove the prism, the mirror, and the pins. Draw a line to join points \(R_4\) and \(R_3\) produce line \(R_4\)\(R_3\) to meet line NO produced at T; measure and record the angle \(\theta\) at T and e at D; repeat the procedure for four other values of i = 30^\circ, 35^\circ, 40^\circ, and 45^\circ. In each case, measure and record the corresponding values of \(\theta\) and e. Tabulate your readings; plot a graph of e on the vertical axis and \(\theta\) on the horizontal axis; evaluate k = s\(^{-1}\) state two precautions taken to ensure accurate results. [Attach your traces to your answer booklet] (b)i. State four characteristics of the image of an object formed by a plane mirror. ii. State two Conditions necessary for total internal reflection to occur in a medium.