What (a) number of provincial departments of education are currently facing investigations regarding (i) school nutrition, (ii) learner transport, (iii) sanitary pads, (iv) infrastructure and/or (v) any other tender irregularities and (b)(i) are the details of each irregularity, (ii) on what date did each investigation begin, (iii) on what date (aa) was each investigation completed and (bb) is each incomplete investigation expected to be completed and (iv) what are the details of any interim findings that were made?