1. (25 Total) Q value, decay equation, and activities. (1) Calculate the Q values for the following decay reaction. (5 points) 2761Co2861Ni+e+v where 2861Ni is 2861Ni in an excited state with 917.5keV to the ground state (2) If there is a 10Ci of 2761Co, is it considered dangerous? And if it is dangerous, given 103 Ci is safe for a researcher to handle, how much time do you need to wait before extracting this radiation source from the shielding bunker? Please list the reference of your half-life time data source. (5 points) (3) Write down the complete reaction equations R1(83211Bi to 84211Po) and R2(84211Po to 82207Pb), respectively, and calculate the TOTAL Q values for the following decay chain reaction. (5 points) 83211BiR184211PoR282207Pb (4) Following (2), there are originally 102Ci of 83211Bi and 103Ci of 84211Po, make a plot with the number of atoms (y-axis) versus time ( x-axis, from 0 minutes to 10 minutes). Please list the reference of your half-life time data source. ( 10 points)