Question $1$

In the structure shown $P1=20kN,P2=49kN,$ and $W=7k\frac{N}{m}.$ The pins at $A,B,$ and D are to be made of steel having ultimate shearing stress equal to $370$ Mpa $,$ and Link $AB($link thickness $=14mm)$ is to be made of steel having ultimate normal stress equal to $535$ MPa $.$ And given that factor of safety for shear stress will be $2\mathrm{.}7$ and for normal stress will be $4.$ Given also that the allowable bearing stress is equal to $260$ MPa $.$ Answer the questions in the table below: $($ALL PINS ARE IN DOUBLE SHEAR$)$ The below answered Questions and the hand$-$written solution must match.