To ask the Scottish Government, further to the answer to question S5W-04450 by Humza Yousaf on 14 November 2016, how much in public grants (a) was paid in Contract Year 5 and (b) has been paid in Contract Year 6 to Serco NorthLink Ferries for the Northern Isles Ferry Service contract, and by what date the final information for Contact Year 6 will be availa...