How old was the Prophet, may Allah bless him and grant him peace, when his mother passed away, and why didn't his mother breastfeed him if he was six years old at the time of her death?

The Prophet's mother, Aminah, breastfed him for a few days, then other women breastfed him. His mother passed away when he was about seven years old. It was the custom of the noble women of Quraysh not to breastfeed their own children, and it was also preferred for children to be raised in the desert.