Calculate the ABCD matrix for one full round trip through this system, starting on the left, traveling to the first mirror, then reflecting, traveling to the second mirror, and reflecting (4 matrices). Give your answer in terms of the distance between the mirrors, d, and the radius of curvature of the mirrors, r. This may be easier to think about as a two-lens system, where you start a distance d from the first lens, travel through that lens, a distance d to the second lens and through that lens. This is a straightforward matrix multiplication problem but be careful to go slowly and keep track of all terms and signs. You may also do this in a symbolic mathematical program if you prefer. First list the 11 element of the matrix you calculated (top left element)