(a)[1]
Use the grid to find the focal length of the lens.
(b(i))[1]
On Fig. 5.1, draw a ray from the top of the object that goes through a principal focus, then passes through the lens and beyond it.
(b(ii))[1]
On Fig. 5.1, draw a second ray from the top of the object that goes through the centre of the lens. Extend this ray to the edge of the grid.
(b(iii))[2]
On Fig. 5.1, draw an arrow to indicate the location and nature of the image formed by the lens.