Calculation fo Standard Error of the Estimate

FIRST EXAM FINAL GRADE 
62 74 
73 93 
88 68 
82 79 
85 91 
77 72 
94 96 
65 61 
91 92 
74 82 
85 93 
98 95 

a. Is the professor correct? Test with  = 0.05. 
b. How accurately do the exam scores predict final grades? Compute the standard error of the estimate.