With regard to parts (a) and (b) of the question, the government does not hold information on overall expenditure at the level requested. However, per capita expenditure for Yorkshire and the Humber for the periods 2012-13 to 2016-17 is shown below as sourced from the Public Expenditure Statistical Analysis (PESA) command paper.
Total identifiable expenditure on services in Yorkshire and The Humber, per head 2012-13 to 2016-17
£ per head
Source: PESA 2018
A link to the latest PESA edition is also provided below:
Table 9.2 will be of interest as it shows total identifiable expenditure on services by country and region, per head between 2012-13 and 2016-17.