my daughter is 50 days old, how many hours she should sleep? and is spitting up normal basically curdled milk splitting

A. In this age managed to sleep for 14 to 16 hours 14 to 18 hours depending from child to child but when we talk about at least this much amount of sleep should be seen every day about 10 hours in the day every child is different they sleep hours is different which is my minimum 10 should be there