Please show all mechanisms!!!!

7.22 Give the principal organic product(s) expected when trans2-butene or another compound indicated reacts under the following conditions. Assume one equivalent of each reagent reacts in each case. (a) Br2 in CH2Cl2, dark (b) N-bromosuccinimide in CCl4, light (c) product(s) of part (b), solvolysis in aqueous acetone (d) product(s) of part (b) +Mg in ether (e) product(s) of part (d) +D2O