The radionuclide 56Mn has a half-life of 2.58 h and is produced in a cyclotron by bombarding a manganese target with deuterons. The target contains only the stable manganese isotope 55Mn, and the manganese - deuteron reaction that produces 56Mn is 55Mn + d → 56Mn + p. If the bombardment lasts much longer than the half-life of 56Mn, the activity of the 56Mn produced in the target reaches a final value of 8.88 x 1010 to Bq.

(a) At what rate is 56Mn being produced?

(b) How many 56Mn nuclei are then in the target?

(c) What is their total mass?