Question

please help with Question 7, question 8 and Question 9. thank you

QUESTION Which of the following shows the correct stereochemistry of the products? NAN DMF solvent (1) CN NaCN DNF solvent) ON + Low A B c (1) only 3 only 12) and (3) (1) and (3) THE FOLLOWING STRUCTURES APPLY TO QUESTIONS 8, 9 AND 10 1.OH 1.OH HO OH HO HO OH HO HO HO HO нога OH o (2) 0 OH 0 (3) 0 QUESTIONS The correct stereochemistry at each chical center, in each compound is A 14R.25 3:15, 2R #:1R 25 (1): 2R, 2R (1): 15,25 11:18, 25 (1): 15, 2 12): 15,25 (2): 1R 2R 123: 15, 2R 12): 1R, c D 14:3R2R (4): 15.25 (3) 1R, 2R 121 QUESTION The correct relationship between the compounds is A (1) and (2) enantiomers.) and (4) are identical B C (1) and (2) are enantiomers, (3) and (4) are enantiomers (1) and (2) re diastereomers, (3) and (4) are enantiomers (1) and (2) are diastereomers, (3) and (4) are diastereomers D