An ice-skating rink specifies that the average (mean) amount of ice on the rink should \( 6 \mathrm{~cm} \) thick, with a standard deviation of only \( 0.5 \mathrm{~cm} \). An inspector picks out a random spot on the ice, and measures \( 4.1 \mathrm{~cm} \) of ice. Assume that the amount of ice on the rink follows a normal distribution. If the ice on the rink is below the mean by more than 2 standard deviations, the ice-skating rink is in danger of losing its license. Is the rink safe to remain open? (10)