Two boys of masses $10 \mathrm{kg}$ and $8 \mathrm{kg}$ are moving along a vertical rope, the former climbing up with the acceleration of $2 \mathrm{m} {\mathrm{s}}^{-2}$ while the later coming down with a uniform velocity of $2 \mathrm{m} {\mathrm{s}}^{-1}$. Then tension in the rope at the fixed support is  (Take $g = 10 \mathrm{m} {\mathrm{s}}^{-2}$ )