Solution

1)

foodME [o:]EModE [u:]PDE [u:]
boatME [ɔ:]EModE [o:]PDE [əʊ]
tideME [i:]EModE [əi]PDE [aɪ]
makeME [:]EModE [ɜ:]/EModE [e:]PDE [eɪ]
greenME [e:]EModE [i:]PDE [i:]
meatME [ɜ:]EModE [e:]PDE [i:]
houseME [u:]EModE [əʊ]PDE [aʊ]

2)

mucheEModE [u]PDE [ʌ]Development belongs to: /u/ split into two phonemes
butEModE [u]PDE [ʌ]Development belongs to: /u/ split into two phonemes
teachyngeEModE [ɜ:]PDE [i:]Development belongs to: GVS
greateEModE [ɜ:]PDE [eɪ]Development belongs to: GVS
backewardeEModE [ɒ]PDE []Development belongs to: /ɒ/ became slightly closer

3)

ME [e:]EModE [i:]as in geese
ME [i:]EModE [əi]as in mice
ME [ɔ:]EModE [o:]as in stone
ME [ɑ:]EModE [ɜ:]as in name
ME [u:]EModE [əʊ]as in mouse
ME [o:]EModE [u:]as in moon
ME [ɜ:]EModE [e:]as in sea