Complete the following based on the given data: 1. Find the average background radiation Lab 3 pg. 3 Ed: Jenuary 2 Average (This will be your background for all measurements below)) In this part of the experiment, data are collected on the effects of shielding using a beta emitter. Subtract the average background and complete the table. Observe what happens to the CPM when more layers of shielding are used. 4. Distance In this part of the experiment, you will observe the counts per minute at various distances from the radiation source Co-60. Subtract the average background and complete the table Complete the table: Graph the data from part 4 (Distance) to see how distance and exposure are related. Graph by hand, take a picture with your phone, and attach to the lab