3. N-13 is used as a radiotracer to measure blood perfusion. a) Which type of radiation would you expect to be emitted by N-13? Explain your answer in 1-2 sentences. b) Write a balanced nuclear reaction for the decay of N-13. c) N-13 is produced at a cyclotron by bombarding water with high-energy protons to produce 13NH3 molecules. If a 100.0 mL sample of water has a pH of 10.57 upon exiting the cyclotron, what is the activity of the sample in Ci? The Kp of NH3 is 1.8 x 10-5 and the half-life of N-13 is 9.97 minutes.