1. The problem statement, all variables and given/known data The problem is regarding the question on the attached file called 'QUESTION3.png' This is urgent so please reply if you can. 2. Relevant equations The attempt is in the file attached. Is my procedure correct? Am I missing something or is something wrong? Also, how do I find the compressive axial force if N- = 20kN? What equation do I use? 3. The attempt at a solution Attempt is attached. Thanks.