Hi, please help me with this exam revision question, thank u!!

Question 3 (Total: 20 marks) a) The weight of a bag of candy is normally distributed with mean 50g and standard deviation 5.3g. For a random bag of candy, determine i. the probability that the weight is more than 51g (3 marks) ii. the probability the weight is between 48g and 51.5g (4 marks) iii. the value of the weight with less than the probability of 0.3 (5 marks) b) The weight of candies in a box from a particular production line is normally distributed with mean 510g and standard deviation 25g. A sample of 25 boxes is to be selected. Determine the probability that the sample mean will be between 503g and 515g? (8 marks)