A 2 kN cylindrical tank of diameter 2 m is to be raised over a 1 m high obstruction. A cable is wrapped around the tank and pulled horizontally as shown (the cable leaves the top of the tank horizontally; the corner A of the obstruction is at the level of the tank centre). Knowing that the corner of the obstruction at A is rough, find the required tension in the cable and the reaction at A. (answers in kN)