With reference to the briefing at the meeting of the Standing Committee on Public Accounts on 29 March 2022, wherein the committee was briefed on the sharp decline in income and the number of commuters making use of the railways, what (a) was the total number of commuters making use of the Passenger Rail Agency of South Africa (Prasa) network in the past five years and (b) was the income generated in the specified period versus the capital grants from the State used to support the operational costs of Prasa?