(i) Derive a consistent finite-volume approximation to the equation u2 du du d = (ii) In addition, write down a second-order finite-difference approximation to the equation. (Note that you don't have to derive the finite-difference approximations to the individual derivative termsjust use centred approximations given in the attached formulae at the end of the exam paper). (i) Derive a consistent finite-volume approximation to the equation u2 du du d = (ii) In addition, write down a second-order finite-difference approximation to the equation. (Note that you don't have to derive the finite-difference approximations to the individual derivative termsjust use centred approximations given in the attached formulae at the end of the exam paper)