With reference to his recent media briefing held on Friday, 12 November 2021, where he informed the public that his department will ensure that there is an adequate supply of oxygen, ventilators, beds and personal protective equipment (PPE) in light of the shortage of beds and oxygen during the third wave of COVID-19 infections, what number of additional (a) beds, (b) ventilators and (c) PPEs does his department estimate will be needed nationally in order to overcome the impact of the fourth wave?