1. Both the average flow rate and average flow time of a process increase by 20%. What will be the percentage change in the average number of units in the process? (Note: If you're not familiar with the definition of percentage changes, here are examples. 20 to 30 implies a 50% change because 30 = 20*1.5 = 20*(1+50%); 20 to 10 implies a -50% change because 10 = 20*0.5 = 20*(1-50%).)

   		20%
   		24%
   		40%
   		44%
   		20%
   		24%
   		40%
   		44%