a. A chocolate company produce chocolate bars, which have a mean fat content of 70 grams and a standard deviation of 0.8 grams. a) bi Calculate the probability of a chocolate bar being chosen at random, to contain more than 71 grams of fat {2 marks) Estimate the number of chocolate bars from a sample of 500 to therefore have a fat content of more than 71 grams (to 2 s.f.) {2 marks) If 5% of the chocolate bars have been found to have a fat content ofxor more, estimate the value ofxto 1 d.p. (4 marks) Calculate the probability of a chocolate bar chosen at random with less than 63 grams of fat [2 marks) Estimate the number of chocolate bars (from a sample of 500) to therefore have a fat content of less than 68 grams (to 2 s.f.) {2 marks) Calculate the probability of a chocolate bar chosen at random with a fat content of between 59 and 3'2 grams