Organic chem questions. If you could could please leave a brief explanation or easy pointer in determining that would be helpful! Also if possible please type or avoid cursive in response! Thank you in Advanced

3. Label each of the following chiral centers as Ror S. b. a. c . Br CH3 H - CH2CH3 d. e. f. CH3 H g. h. i. NH2 Br H3C- -OH HO " H k. 1. NH2 H m. n. o . H CI Br -CH3 HO -CHE NH2 NH2 p. 9. r. H- For H -CH3 CH2CH3 OH s. t. u. HO 2011 cx v. W. Br u