a) show work please

12. Caffeine acts as a stimulant by binding to the adenosine receptor in the brain. The structure of caffeine and the absorption spectrum of a sample of 50 mg of caffeine dissolved in 1 ml and measured in a cuvette with a 1-cm path length are shown below. The molecular weight of caffeine (Mr) is 194. 0.25 0.20 0.15- Absorbance CH 0.10 H3C 0.05 0- 250 350 CH3 300 Wavelength (nm) (a) Discuss what the absorption spectrum of caffeine suggests about the state of hybridization of the two nitrogen atoms in the 6- member ring and calculate the molar extinction coefficient (molar absorptivity) of caffeine at 273 nm and. [20%]