Catherine dies on 20 December 2019, having made only the following transfers during his lifetime:

Date	Transfer
5 July 2009	Gift to daughter	50,000
4 October 2013	Gift to relevant property trust	516,400
11 May 2014	Gift to son on marriage	50,000

The annual exemption for tax year 2008/2009 and 2012/2013 have not been used, and the Nil rate band has not been used as well.

Required:

a) Calculate the IHT payable during Catherines lifetime (if any) in relation to each of the above transfers, assuming that Catherine paid this tax herself.

b) Calculate any further IHT payable on Catherines death.

c) Discuss the differences between chargeable lifetime transfer and potential exempt transfer.