[填空题]
Three mountain climbezjev 4 0u) ,8/xupkikpvqw1 e;rs whs 45qlfd:c/mrbj.b;4l*l k, gu . epxko are roped together are ascending an ice field inclined at ldj.b/4pr k;k5sme.fx gu clb,4q *:l 21.0$^{\circ}$ to the horizontal. The last climber slips, pulling the second climber off his feet. The first climber is able to hold them both. If each climber has a mass of 75 kg , calculate the tension in each of the two sections of rope between the three climbers. Ignore friction between the ice and the fallen climbers.
