14.11 Determine the p-value for the following hypothesis tests involving the sign test:

a. Ho: P()  0.5 vs. Ha: P()  0.5, with n  18 and x  n()  3

b. Ho: P()  0.5 vs. Ha: P()  0.5, with n  78 and x  n()  30

c. Ho: P()  0.5 vs. Ha: P()  0.5, with n  38 and x  n()  10

d. Ho: P()  0.5 vs. Ha: P()  0.5, with n  148 and z  2.56