can you please help me to find the right letter(answer) of every number? it will help me a lot .Thank in advance

1. What is the total area in the distribution under the curve? A.0 B. 1 C. 2 D. 3 2. Which value is found at the center of the normal curve? A. mean B. median C. mode D. all of the above 3. This refers to the measure of position with data divided into 100 parts. A. Percentiles B. Quartiles C. Deciles D. Median 4. Which of the following is a parameter of normal distribution? A. mean B. standard deviation C. mean and standard deviation D. none of the above 5. Which of the following does not describe a normal curve? A. asymptotic B. bell-shaped C. discrete D. symmetrical about the mean 6. What percent of the area under a normal curve is within 2 standard deviations? A. 68.3% B. 95.4% C. 99.7% D. 100% 7. Which of the following denotes the standard normal distribution? A. A B. X CY D. Z 8. Which of the following describes the standard normal distribution? A. has a mean of zero (0) and a standard deviation of 1. B. has a mean of 1 and a variance of zero (0). C. has an area equal to 0.5. D. cannot be used to approximate discrete probability distributions. 9. 8. A random variable X has a mean of 4 and a standard deviation of 2. What is the corresponding z-score for x = 77 A. 0.5 . B. 1.0 C. 1.5 D. 2 10. What is the area if the z - score given is -1.837 A. 0.0344 8. 0.0336 C. 0.0329 D. 0.0322 11. What is the z-value if the area is 0.96087 A. -1.76 B. -1.77 C. 1.76 D. 1.77 12. Using the standard normal curve, what is the approximate area of P(1.63