Physical Chemistry II. Please assist with questions #1, #3, #4 with clear explanation.

1. What are the rate equations for the reaction CO+O2CO2 using change of the [CO], [O2], and [CO2] ? 2. What are transition state, reaction barrier, and intermediate? 3. The half-life of a first-order reaction is 30 seconds. What is the rate constant of the reaction? 4. In an ongoing first-order reaction, the concentration of the reactant decreased by 6.85% after 14 days. Calculate reaction rate constant, half-life, and time required to decrease the concentration of the reactant to 10% of initial reactions