Basing your answers on the bond dissociation energies in Table 4.3, calculate which of the following reactions

Question:

Basing your answers on the bond dissociation energies in Table 4.3, calculate which of the following reactions are endothermic and which are exothermic:
(a) (CH3)2CHOH + HF → (CH3)2CHF + H2O
(b) (CH3)2CHOH + HCl → (CH3)2CHCl + H2O
(c) CH3CH2CH3 + HCl → (CH3)2CHCl + H2