(Not a teacher)
Standard English is simply /w/, however /hw/ (personally, I write /ʍ/) is also correct for words that begin with 'wh' in spelling.
The vowel you used is incorrect. /ɒ/ is the vowel sound in 'what' in Standard British English, /ʌ/ is the vowel sound in 'what' in Standard American English.
Are all correct, and standard. Expect to hear the final /t/ realised as a glottal stop /ʔ/ in most accents when spoken in connected speech.
Student or Learner