(3 points) S-adenosylmethionine (SAM) is an important molecule in the cell because it serves as the methyl donor to many methyl transfer reactions. SAM is synthesized from L-methionine by using ATP. In the first step, the sulfur group of methionine attacks the C5' of ATP to give SAM and triphosphate (PPPi). In the second step, the triph osphate is hydrolyzed by the enzyme to give pyrophosphate (PPi) and inorganic phosphate (Pi). The reactions are: Step 1: L-methionine +ATPSAM+ PPP i Step 2: PPPi+H2OPPi+PiGo=19.2kJ/mol Overall: L-methionine +ATP+H2OSAM+PPi+PiKeq=1104M a. Given the information above, calculate the Go(kJ/mol) and K eq of Step 1 shown above. (Note: the prime designation indicates pH=7.) b. In Step 1, the desired product SAM is already formed by the enzyme. What is the significance of Step 2 ( PPPi hydrolysis) for the thermodynamics of the overall reaction