QUESTION 4 4.1 In the diagram below, B is the foot of a multi-storey building. Three people, D, E and C, are standing at the windows on three different floors. They are all looking at object A on the ground, which is in the same horizontal plane as B. AC-9 units, BC - 5 units and A₁ = A₂-A,. Calculate, correct to TWO decimal places, the: 4.1.1 Size of CAB 4.1.2 Length of AE 4.1.3 Length of DE D Ground level