my baby is 4 month 9days old his not rooling wt can I do plz suggest me

A. Hai good afternoon !! Generally babies roll over around 3-5 months ,some may take time 4-5 months . As baby is 4 months old yet there is time. Do tummy time daily - Keep a mat or blanket on floor place baby on tummy side for 10-15 minutes daily this regular tummy time helps in holding neck,roll over,crawling,strengthening abs.