The product temperatures at the center of particles carried through a holding tube of thermal processing system haven been predicted as below: [Time (s), Temperature (deg C)] = [0, 85]; [5, 91]; [10, 103]; [15, 110]; [20, 116]; [25, 120]; [30, 123]. The purpose of this thermal process is to reduce the population of a thermally resistant microbial spore with a D121.1= 0.4 min and z of 9 C. Predict the extent of microbial reduction using this process.