Please help with #1-#4 Thank you!!

A B 1 Exp Cond Helping 2 Sync Yes 3 Sync Yes 4 Sync No 5 Sync Yes 6 Sync No Proportion Test (N Outcomes) 7 Sync Yes 8 Sync Yes 9 Sync No 10 Sync Yes Proportions - Helping 11 Sync Yes Level Count Proportion 12 Sync Yes 13 Sync Yes 0.517 14 Sync No No Observed 15 15 Sync Yes Expected 14.5 0.500 16 Not Sync No 17 Not Sync Yes Yes Observed 14 0.483 18 Not Sync No Expected 14.5 0.500 19 Not Sync No 20 Not Sync No 21 Not Sync No 22 Not Sync No 23 Not Sync Yes x' Goodness of Fit 24 Not Sync No 25 Not Sync Yes x2 df p 26 Not Sync No 27 Not Sync No 0.0345 1 0.853 28 Not Sync No 29 Not Sync No 30 Not Sync Yes Questions 1. Why did we conduct a chi-square goodness-of-fit test instead of a chi-square test for independence? 2. How many babies did we expect to have in each group? 3. Was there a significance difference in the proportion who helped vs. didn't (use an alpha level of 0.05)? Write out the value you used to decide? 4. Write the result in APA style