Banded symmetric matrices is used to make computational work more efficient. Figure 2 shows the mesh for a cantilever beam. Wys YL Figure 2 (a) By re-sketching Figure 2, propose a mesh numbering for the Figure 2. Specify the basis for your proposed mesh numbering. (4 marks) (b) By determining the semiband width for your proposed mesh numbering, estimate how many time the execution time can be faster that those without using banded storage method. (6 marks)