I need help answering question 18 A, B and C. Can someone please help me with this.

A researcher had found a new behavioral method to have children decrease their sugar intake. They wanted to know what percentage of children in their study actually had a decrease below 40 grams of sugar per day. The average intake is M=50g with a s=5g.

A) Write out the probability notation

B) Draw the curve and include the numbers and shade in the area the researchers are interested finding out about. C) What is the percentage of children that will decrease their sugar to 40g/day or less after using their behavioral technique?