The decarboxylation of oxaloacetate into pyruvate and CO2 at pH 5 and 25C is 10% complete in 5 s, 44% complete in 25 s, 58% complete in 38 s, and 90% complete in 100 s. What is the reaction order with respect to oxalacetate and the rate constant (including units) for the reaction? Show your work.