Two blocks of masses 2.9 kg and 1.9 kg are suspended from a rigid support ‘S’ by two inextensible wires each of length 1 meter, as shown in the figure. The upper wire has negligible mass and the lower wire has a uniform mass of 0.2 kg/m. The whole system of blocks, wires and support  have an acceleration of 0.2 m/s² (g=9.8m/s²) Then the tension at the mid point of the upper wire is