please answer the following :)

1. The Hybrid Owners Association of America suggested that the average time it takes to make up the extra cost of a hybrid car is 1.5 years. Nine random hybrid car owners were surveyed to See if the time to make up the extra cost was more than 1.5 years. The population is normally distributed. The survey of owners produced the following results de=l.75 n=9 a. (1 point) Using an a = 0.01 level of signicance, state whether you should Reject or Not Reject the Null Hypothesis that y = 1.5 years