An oxidation reaction of A with molecular oxygen (O2) to product P occurs on a solid catalyst. 3a). Write down the steps in the Langmuir-Hinshelwood mechanism assuming competitive non- dissociative adsorption of all the three species (A, P and 02) and irreversible surface reaction liberating one of the involved active sites. Derive the corresponding rate law. 10 pts 3b). Write down the steps in the Eley-Rideal mechanism assuming oxygen reacting from the gas phase directly, as well as fast equilibrated non-dissociative competitive adsorptions of A and P and the irreversible surface reaction as an RDS. Derive the corresponding rate law. 10 pts