$(14$ points$)$ Michaelis$-$Menton $($M$-$M$)$ Kinetics

$4$A$.(4$ pts$)$ What fundamental concept did the Michaelis$-$Menton scheme introduce to the field of enzyme kinetics? What are two assumptions made by the M$-$M mechanism?

$4$B$.(4$ points$)$ Draw the M$-$M mechanism making sure to label important constants. Write the equation describing free enzyme conctintration and describe why it is necessary.

$4$C$.(6$ pts$)$ Briggs Haldane kinetics must be used when one key assumption of the M$-$M mechanism does not hold true. What is this assumption? What is the term that is used in place of Km in the Briggs Haldane rate equation and what does each component of this term signify?