(a) What was the percentage of budget and actual amount of money budgeted for maintenance of infrastructure owned by her department in the 2017-18, 2018-19 and 2019-20 financial years and since 1 April 2020, (b) what percentage and actual amount of the budgeted amounts were spent in the 2017-18, 2018-19 and 2019-20 financial years, (c) what were the reasons why the budget was either over- or underspent in each case and (d) which votes and/or line items were either increased and/or reduced as a result?