20.2 Melanie bought a house in November 1979 for £18,000. The house had a market value of £21,000 on 31 March 1982 and was sold on 31 October 2009 for £163,000. Compute the chargeable gain arising in each of the following cases:

(a) Melanie occupied the house as her principal private residence throughout the period of ownership.

(b) Melanie occupied the house throughout her period of ownership with the exception of the period between 1 June 1987 and 31 May 1991 when she lived with a friend.

During this time the house stood empty.

(c) As

(b) except that the house was let as residential accommodation during Melanie's absence.