b. (1E,32,52,7E)-Nona-1,3,5,7-tetraen-1-yl)benzene O can undergo an electrocyclisation reaction to form compound P as shown in Figure 5. P Figure 5 (i) Draw the chemical structure of compound P. [3 marks] (ii) Applying a frontier orbital approach, explain the relative stereochemistry at the new stereogenic centres in compound P. Show the mechanism by which compound P is formed. [5 marks] (iii) [3 marks]