Whether, with reference to his reply to question 1484 on 18 April 2015, the Public Investment Corporation (PIC) has made any investments in the stock of the SA National Roads Agency Limited (Sanral) regarding the Gauteng Highway Improvement Project and more specifically in stock that is in any way associated with the Gauteng e-tolling system; if not, why not; if so, (a) in what stock was the investment made, (b) what are the amounts that have been invested and (c) why was/were this/these investment/s made?