$*8-16.$ Direct tension indicators are sometimes used instead of torque wrenches to ensure that a bolt has a prescribed tension when used for connections. If a nut on the bolt is tightened so that the six $3-mm$ high heads of the indicator are strained $0\mathrm{.}1m\frac{m}{m}m,$ and leave a contact area on each head of $1\mathrm{.}5m{m}^2,$ determine the tension in the bolt shank. The material has the stress$-$strain diagram shown.