With reference to her reply to question 2463 on 5 September 2017 regarding the amount of debt owed to the National Student Financial Aid Scheme (NSFAS) by drop-outs, (a) what is the total number of students who dropped out whose debt adds up to R4,002 billion, (b) of this number, how many dropped out due to (i) academic exclusion, (ii) financial exclusion and (iii) other reasons, (c) what proportion of the debt owed by drop-outs has been repayable for (i) less than three years and (ii) more than three years, (d) what amount of the drop-out debt has (i) prescribed and (ii) been written off and (e) whether each amount has been included in the total amount of debt owed to NSFAS by drop-outs?