The table shows the position of a cyclist. (a) Find the average velocity for each time period. (i) (ii) [1,3] [2,3] \[\mathrm{m}/\mathrm{s} \]\[ \mathrm{m}/\mathrm{s} \] (iii) [3,5] \[\mathrm{m} / \mathrm{s} \] (iv) [3,4] \[\mathrm{m}/ \mathrm{s} \] (b) Estimate the instantaneous velocity when t = 3