please answer 7 and 8. thank you!

7) Which of the alcohols listed below would you expect to react most rapidly with HBr, assuming the reaction pathway is predominantly SN1 ? b) (CH3CH2)2CH2CH2OH c) (CH3)2CHCH2CHOHCH3 d) CH3CH2CH2CH2CH2OH c) (CH3CH2)2C(CH3)OH s properly named: a) 1,2-Cyclopentanediol b) 1,5-Cyclopentanediol c) (1R,2R)-1,2-Cyclopentanediol d) (1R,2S)1,2-Cyclopentanediol e) (1S,2S)-1,2-Cyclopentanediol