Please help me answer the following with complete solution

3. Which of the following are examples of independent events? a.) Obtaining a three and a four in one roll of two fair dice b.) Obtaining an ace and a king in that order by drawing twice without replacement of a deck of cards c.) Obtaining an ace and a king in that order by drawing twice with replacement from a deck of cards d.) A cloudy sky followed by train e.) A full moon and eating a hamburger Answer: I 4. The heights of 500 students from the college of Nutrition/ Home Economics and Tourism are normally distributed with a mean height of 5.7 feet and a standard deviation of 1.9 feet. How many of these NHT students have heights of a) Less than 5.2 feet b) More than 5.1 feet but not over 5.5 feet c) More than 4.9 feet