$20$ g sample of cobalt is irradiated in a power reactor with a flux of $10^14$ neutrons$/$cm$^2$ s for $6$ years. Calculate $($a$)$ the activity of $60$m$-$Co immediately upon removal from the reactor in Curies and $($b$)$ the activity of $60-$Co immediately after removal from reactor in Curies. $($Assume no source depletion.$)$