$$ A close coiled helical compression spring has a mean coil diameter of $60$ mm and the diameter of the wire is $10$ mm$.$ Number of active and inactive coil turns is $11$ and $2$ respectively. Free length of the spring is $210$ mm$.$ Decide the maximum load that can be applied on the spring if the minimum load is one third of the maximum load. Use FoS $=1\mathrm{.}5,$ Sys $=700$ MPa and Sse $=360$ MPa