Two blocks of masses 2.9kg and 1.9kg are suspended from a rigid support S by two inextensible wires each of length 1m, as shown in the figure. The upper wire has negligible mass and the lower wire has a uniformly distributed mass of 0.2kg. The whole system of blocks, wires and support  have an upward acceleration of $0.2 \mathrm{m}/{\mathrm{s}}^2$. Acceleration due to  gravity is $9.8 \mathrm{m}/{\mathrm{s}}^2$. Find the tension at the mid-point of the upper wire.