Asap! will mark brainliest! answer !
1. a fuel injection system is designed to last 18 years, with a standard deviation of 1.4 years. what is the probability that a fuel injection system will last less than 15 years?

a. 25%
b. 33%
c. 2%
d. 20%

2. for kaley to be accepted into her favorite college, she will have to earn an entrance exam score at least 2 standard deviations above the mean. assume entrance exam scores are normally distributed, with a mean of 750 and a standard deviation of 40. what exam score does kaley need to be accepted at her favorite college?

a. 710
b. 790
c. 830
d. 870

3. wait times at an orthodontist's office are typically 17 minutes, with a standard deviation of 2 minutes. what percentage of people should be seen by the doctor between 11 and 23 minutes for this to be considered a normal distribution?

a. 17%
b. 68%
c. 95%
d. 99.7%