The masses of lettuces sold at a market are normally distributed with mean 700 g and standard deviation 70 g. (a) if a single lettuce is chosen at random, find the probability that its mass lies between 380 g and 650 g Enter a number correct to 4 decimal places: (b) Find the mass (in grams) exceeded by 11 % of the lettuces. Enter a number correct to two decimal places; (c) in one day, 1000 lettuces are sold. Estimate how many (of those 1000) weigh less than 560 g Enter an integer