Boom AB is held in the position shown by three cables. Knowing that the tensions in cables AC and AD are 4 kN and 5.

Boom AB is held in the position shown by three cables. Knowing that the tensions in cables AC and AD are 4 kN and 5.2 kN, respectively, determine (a) the tension in cable AE if the resultant of the three tension forces exerted at point A of the boom must be directed along AB, (b) the corresponding magnitude of the resultant