Extracted text: 2. INTERVISIBILITY OF STATIONS. Cathedral Hill is on a line between Constable Hill and Aurora Hill. Cathedral Hill is 6.253km from the Constable Hill and Aurora Hill is 11.081km from the Constable Hill. The elevation of the hills are: Constable Hill, 1260.86m; Aurora Hill, 1266.44m; and Cathedral Hill, 1261.04m. Determine the following: a. Elevation of the line of sight from Constable Hill at the vicinity of Cathedral Hill. b. Height of identical towers to be constructed at Constable Hill and Aurora Hill so that the line of sight will clear Cathedral Hill by 5.0m c. Height of tower to be constructed on Constable Hill so that the line of sight will clear the ground at Cathedral Hill by 5.0m if no tower is to be constructed on Aurora Hill. d. Height of the tower to be constructed on Aurora Hill so that the line of sight will clear the ground at Cathedral Hill by 5.0m, if now tower is to be constructed on Constable Hill.