Can someone please help? Thank you

Dr. Montgomery conducted an experiment to see if reading a message about a person prior to listening to them give a speech would influence evaluations of the speaker's credibility. 121 participants were randomly recruited and assigned into one of two groups: Group 1 read a positive message about the speaker and then listened to a recorded speech. Group 2 read a negative message about the speaker and then listened to the same recorded speech heard by those in Group 1. After listening to the speech, participants rated the speaker's credibility on a scale of 1 (not at all credible) to 7 (extremely credible).

Results indicated that participants assigned to Group 1 (i.e., the positive condition) gave the speaker higher credibility scores (M = 4.94, SD = .70) than participants in Group 2 (i.e., the negative attribution condition), (M = 3.15, SD = .74).

Dr. M ran an independent samples t test and obtained the following t score: t(120) = 23.78

1) What are the H₁ and H₀ implied by this scenario?

2) With the degrees of freedom of 120 and alpha = .05, what is the critical t value that must be met before rejecting H₀?

3) Based on the critical t found for Question 2, should Dr. M retain or reject the null hypothesis? Explain your response.