(1) (a) How many investigations were conducted for (i) overbilling and (ii) overcharging for goods and services rendered by (aa) external contractors and (bb) service providers in the past five financial years and (b) how many of these investigations were conducted (i) internally, (ii) by the Office of the Public Protector, (iii) by the SA Police Service or (iv) by the Special Investigating Unit; (2) (a) how many of these investigations were conducted by external private sector entities and (b) what are the names of these entities; (3) (a) what total amount of money was lost by her department due to (i) overbilling or (ii) overcharging and (b) what was the (i) outcome of each investigation and (ii) breakdown of monies recovered in each specified financial year respectively?