a. If the manufacturer wants to adjust the production process so only 1 candy bar in 1000 weighs less than the advertised weight, what will the mean of the actual weights be (assuming the standard deviation of the weights remains 0.04 ounces)?

b. If the manufacturer wants to adjust the production process so the mean remains at 2.2 ounces but only 1 candy bar in 1000 weighs less than the advertised weight, how small does the standard deviation of the weights need to be?

c. If the manufacturer wants to adjust the production process so the mean is reduced to 2.15 ounces but only 1 candy bar in 1000 weighs less than the advertised weight, how small does the standard deviation of the weights need to be?

Please type , i have a hard time reading writing.