what the Ea is and how enzymes lower it (enzyme-substrate complex)?

Please handraw this graph with all the necessary detailed information:   Imagine that I text enzyme rate for four different temperatures: 10 degrees celsius, 20 degrees celsisus, 30 degree celsius, and 40 degree celsius, in separate tubes. The enzyme appears to work faster as temperature increases, but completely ceases activity at 40 degrees celcius. Sketch a graph to show this outcome, but here you will graph product formation (nmoles/mL) vs. time (minutes). The graph should be 4 lines and HANDDRAWN. Include a legend if necessary. You do not need precise quantitivate values, but most show the correct trends on the graph.

DURING THE TRANSITION REACTION:   What is the substrate? What are the products?   Why is this called “Transition”?

What effects does pH have on enzyme activity? Cite relevant experimental data. How can you explain this relationship(cause)?