I am in summer school and I missed both of these on my test and my final is cumulative and there will be questions like these on the final.
2. Find (delta Hrxn) for the reaction CO(g) + NO2(g) --> CO2(g) + NO(g). Is the reaction exothermic or endothermic? Explain.
To answer these questions, it requires some reference material.
Your first question is a relatively simple one, where you have to draw a reaction profile energy diagram that displays an exothermic reaction, which means your starting materials (reactants) have to be at a higher energy than your final products.
Check out the following link for a proper drawing of one of these ...
This solution is provided in 269 words. It gives a reference to help understand how to draw a diagram for an exothermic reaction, as well as a link to a heat of formation table and equation for discovering if a reaction is exothermic or endothermic.