Identify the critical t values for each of the following tests:

a. A single-sample t test examining scores for 26 participants to see if there is any difference compared to the population, using a p level of 0.05

b. A one-tailed, single-sample t test performed on scores on the Marital Satisfaction Inventory for 18 people who went through marriage counseling, as compared to the population of people who had not been through marital counseling, using a p level of 0.01

c. A two-tailed, single-sample t test, using a p level of 0.05, with 34 degrees of freedom