Two students are asked to measure the rate of emission of alpha particles from a certain radioactive sample. student a watches for 2 minutes and counts 32 particles. student b watches for 1 hour and counts 786 particles. (the sample de- cays slowly enough that the expected rate of emission can be assumed to be constant during the measurements.) (a) what is the uncertainty in student a's result, 32, for the number of particles emitted in 2 minutes? (b) what is the uncertainty in student b's result, 786, for the number of particles emitted in 1 hour? (e) each student now