(Solved): For the gravity retaining wall shown in Figure below, given that =45+/2,=12,=5 and ...

For the gravity retaining wall shown in Figure below, given that $?=45^{?}+?/2,?=12^{?},?=5^{?}$ and $?=10^{?}$, use Coulomb's graphical method to: i. Prove that the weight of the trial wedge is $124\mathrm{kN}/\mathrm{m}$; (3 marks) ii. Determine the total active force for the wedge. Use a scale of $1\mathrm{mm}:1\mathrm{kN}/\mathrm{m}$ for your force polygon. (3 marks)