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I am stuck on this question from the mastering physics website. Can you help?

Problem 4.89
Three mountain climbers who are roped together are ascending an icefield inclined at 24.0^circ to the horizontal. The last climber slips, pulling the second climber off his feet. The first climber is able to hold them both.
Part A
If each climber has a mass of 78kg , calculate the tension in the section of rope between the first and the second climbers. Ignore friction between the ice and the fallen climbers.
Express your answer using two significant figures.
F_{rm T1} =
rm N
Part B
If each climber has a mass of 78kg , calculate the tension in the section of rope between the second and the third climbers. Ignore friction between the ice and the fallen climbers.
Express your answer using two significant figures.
F_{rm T2} =
rm N
I know that the x axis runs along the incline but I'm not sure what else is going on in this one.
Expert answered the question
Dear Student