5.21(a), (b), (d), (f), (g), (i), (j)

5.22(a), (b), (c), (e), (g)

5.23, 5.26

5.27 (a) (ii), (iv)

5.29 (a) (i)(iii) and (c)

5.30 (a), (b) (ii) (iv), (c) (i)

5.33 (a), (b)(ii) (iv), (c)(ii)

5.34

5.36(a), (b)(ii)(iv)