a) Elon Musk produces Solar Tiles. The tolerance lower and upper specification limits are 6 and 21 lbs respectively. The factory produces the tiles with an average weight of 12 lb and the standard deviation is 2 lb. Is this process capable of producing the pens to specification? Explain I b) When the tiles production process reaches 4.5 Sigma process, what would the Cp be for this process? Please derive / prove the answer mathematically from your understanding of the process capability theory