[10 marks] 11. Let S be the surface s' +y' + (2-1)' -4 with 2 2 0, with orientation pointing away from the centre of the sphere (i.c., S is the part of the sphere of radius 2, centered at (0, 0, 1), for which = 2 0). Evaluate Jf curl F . d5, where F - (roz tan(ryz) ty + 1. ev'sin(2 ))