Given that in a coded language, ‘$645$’ means ‘day is warm’; ‘$42$’ means ‘warm spring’ and ‘$623$’ means ‘spring is sunny’; which digit represents ‘sunny’?

In a certain code language
$\left(1\right)$ ‘po ki top ma’ means ‘Usha is playing cards’
$\left(2\right)$ ‘kob ja ki ma’ means ‘Asha is playing tennis’
$\left(3\right)$ ‘ki top sop ho’ means ‘they are playing football’
$\left(4\right)$ ‘po sur kob' means ‘Cards and tennis’

Which word in that language means ‘Asha’?

Q's mother is sister of P and daughter of M. S is daughter of P and sister of T.How is M related to T?