Given the data below, answer the questions.

x       347,   247,    481,    245, 271 

y           7,   10,         7,       2,       7

a) Find the value of the linear correlation coefficient r. 

b) Is there a linear correlation between the x and y values? Do a test. 

c) Find the equation of the regression line. Predict y when x is 3. 

d) Find the value of the rank correlation coefficient rs.