Please show work and attention to units. Thank you.

Key constants and parameters: R=0.08206Latmmol1K1:R=8.314Pa2mol1K4:0C=273K:NAV=6.021022 Mass atmosphere =5.1102atg : Average Mol. Mass atmosphere =29.0gmol1. 1Gt= Gigatonne =11015g:1Mt=Meg gatonne =1Tg=Teragram=11012g : 1m2=1000L=1104cm2:1L water =1kg. 2. At an altitude of 33km, the concentration of O3 in the stratosphere is 6.76ppm ( 25C and 0.0100atm). a) Calculate the density of O2 in molec. cm44 units at 33km altitude. b) Calculate the concentration of O2 in gm4 at 33km altitude