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\includegraphics[max width=\textwidth, alt={}, center]{e11bebff-1c09-4576-9b9b-a1678ea2b226-04_397_759_264_694} A particle of mass 2.5 kg is held in equilibrium on a rough plane inclined at \(20 ^ { \circ }\) to the horizontal by a force of magnitude \(T \mathrm {~N}\) making an angle of \(60 ^ { \circ }\) with a line of greatest slope of the plane (see diagram). The coefficient of friction between the particle and the plane is 0.3 . Find the greatest and least possible values of \(T\).