Answer:
a) F. H 0 : μ O ≥ μ C
H 1 : μ O < μ C
b) B. two-tailed
d)  
  
e)  
  
f) B. Reject the null hypothesis
Step-by-step explanation:
Information provided
 represent the mean for the Orange Coast
 represent the mean for the Orange Coast
 represent the mean for the Coastline
 represent the mean for the Coastline
 represent the sample standard deviation for Orange Coast
 represent the sample standard deviation for Orange Coast
 represent the sample standard deviation for Coastline
 represent the sample standard deviation for Coastline
 sample size for Orange Coast
 sample size for Orange Coast
 sample size for Coastline
 sample size for Coastline
 Significance level provided
 Significance level provided
t would represent the statistic 
Part a
For this case we want to test the claim that the mean GPA of Orange Coast students is smaller than the mean GPA of Coastline students 
Null hypothesis: 
  
Alternative hypothesis: 
  
F. H 0 : μ O ≥ μ C
H 1 : μ O < μ C
Part b
For this case we need to conduct a left tailed test.
B. two-tailed
Part d
The statistic is given by:
 (1)
 (1)  
And the degrees of freedom are given by  
  
Replacing the info we got:
 
  
Part e
We can calculate the p value with this probability:
 
  
Part f
Since the p value is a very low value compared to the significance level given of 0.005 we can reject the null hypothesis. 
B. Reject the null hypothesis