(3 points for the calculations below) Calculate M from the equation I =Ie " with the exponent from the best linear fit. Calculate u from the equation / In(2) m with x determined from the graph. m (P x) 112Counts - background) per minute vs. Pb Thickness (cm) (Counts - background) per minute - 809e^-0.72x 800 700 600 500 (Counts - background) per minute 400 0.00 0.25 0.50 0.75 1.00 1.25 Pb Thickness