How do you do longhand I got test statistic 1.518 and it was wrong

Test the claim below about the mean of the differences for a population of paired data at the level of significance . Assume the samples are random and dependent, and the populations are normally distributed. Claim: Hy = 0; o = 0.05. Sample statistics: d = 3.5, Sy = 8.47, n = 9 YA. Ho: Hy = 0 OB. Ho: Hy 20 Ha : Hy # 0 Hai Hy 0 OE. Ho: HAD OF. Ho: My > 0 Ha: Hy 20 Ha: Hy SO The test statistic is t = . ( Round to two decimal places as needed.)