With reference to Grade R teachers in Limpopo, (a) how many teachers are employed by the provincial department of education, (b) at which schools are these teachers employed, (c) how many teachers (i) moved from teaching other Grades to teach Grade R and (ii) of these, how many moved to other schools to teach Grade R and (d) what salary was paid monthly to each of the Grade R teachers (i) in the 2013-14 financial year and (ii) since 1 April 2014?