Given the following spotlights placed as shown in the diagram. Assume isometric distribution of the light 1) The Area A1 is 3.14 m2 , The Lamp #1 has a Luminous flux of 400 lumens, and the Distance D1 is 4 meters. a. What is the Beam Angle of the Lamp #1? b. What is the illuminance on the A1 (the Lamp#2 is off) 2) The Area A2 is 12,56m2 , The Lamp#2 has a Luminous flux of 600 Lumens and the distance D2 is 2 meters a. What is the Beam Angle of the Lamp #2? b. What is the illuminance on the A2 (the Lamp#1 is off) 3) The two lamps are ON. What will be the illuminance on the area A3 (where the two beams superpose each other