Phonetics and the IPA 8, Exercise 1: classify the change

handbag -> [ˈhæmbæɡ]   assimilation (place). [d] is elided and [n] becomes
                       [m] to match the following [b]. (Wikipedia notes the
                       [d] is elided, so elision also plays a part.)
him -> [ɪm]            elision: the initial /h/ is lost.
to Cambridge, [tə]     weak form: the unstressed grammar word reduces.
would you -> [wʊdʒu]   assimilation by coalescence: /d/ + /j/ fuse into [dʒ].