In each of the past four financial years, what (a) amount was spent on (i) technical assistance interventions and (ii) training by the National Youth Development Agency (NYDA), (b) number of small and medium enterprises (SMEs) were (i) assisted through technical interventions and (ii) trained by NYDA, (c) number of jobs were created by the specified SMEs and (d) number of the SMEs still exist and are still trading?