List the order of both Sn1 and Sn2 reactivity for these organic halides.

Question

1-bromobutane, 1-chlorobutane, 2-bromobutane, 1-bromo-2-methyl propane, 2-bromo-2-methyl propane, 2-chloro-2-methyl propane, Allyl Bromide, Allyl Chloride, Benzyl Chloride, Bromobenzene