With regard to the funds allocated for the purpose of fee-free higher education and training for students from households with income less than R350 000, (a) is the additional R57 billion allocated funding sufficient, (b) what are the assumptions used for costing free-fee higher education and (c) what is the breakdown of (i) what was used as the intake rate/enrolment rate, (ii) the time assumed for completing a qualification, (iii) cost per student and (iv) of the cost per student per (aa) university student and (bb) technical and vocational education and training college students for each financial year during the period 2018-19 up to 2020-21?