With regard to the Agricultural Research Council and Onderstepoort Biological Products, what are the (a) latest findings from the investigation ordered by the Auditor-General on (i) serious mismanagement, (ii) irregular expenditure and (iii) serious supply chain irregularities that took place over the past four financial years, (b) details of the refurbishment and modernisation of the existing Good Manufacturing Practice facility and (c) details of all procurement done for Covid-19 related purposes?