Three chemicals in a reactor have concentrations (mol/L) given by C1(t)=10e−0.3t, C2(t)=8−0.5t2, and C3(t)=5ln(t+1), where t is measured in hours. At t=2, rank the chemicals from fastest decreasing concentration to fastest increasing concentration by evaluating their instantaneous rates of change, and state each rate with appropriate units.