With regard to Budget 2017 and to contracts signed by the government with McKinsey and Company, its partners or consultants, since November 4, 2015, for each contract: (a) what is the (i) value, (ii) description of the service provided, (iii) date and duration, (iv) internal tracking or file number; (b) was the contract sole sourced; (c) what specific role did McKinsey and Company, its partners or consultants, or Dominic Barton play in the preparation of Budget 2017; (d) what specific sections of Budget 2017 were prepared by, in whole or in part, by McKinsey and Company, its partners or consultants; and (e) what are the details of any briefing notes or memorandums regarding Budget 2017, McKinsey and Company, its partners or consultants, or Dominic Barton, including for each the (i) sender, (ii) recipients, (iii) title and subject matter, (iv) date, (v) internal file or tracking number?