A sample has a mass of m=1g that contains 2 radioactive elements (20% of element one and 80% of element 2) with molar masses of M1=25g/mole and M2=63 g/mole and T1 = 60 s and T2 =12.7 h, respectively. 1. Calculate the number of radioactive nuclei in the sample at t=0 (A0) 2. Calculate the activity of the sample after 6 minutes 3. Calculate the activity of the sample after 63.5 hours 4. What is your conclusion.