What is the ruling regarding the prayers and fasting that the questioner performed during the period of her ignorance of the obligation of ghusl after masturbation, and is she required to make them up?

If masturbation leads to the emission of semen, then ghusl (ritual bath) becomes obligatory. If you pray without performing ghusl after the emission of semen that necessitates it, there is a difference of opinion among scholars regarding the obligation of redoing those prayers. The more cautious approach is to make them up. As for fasting, it is valid even in a state of janabah (ritual impurity). If you engaged in masturbation during the daytime in Ramadan, being ignorant that it is among the things that break the fast, then the preponderant opinion is that you are not required to make up those days.