Woman's Tefilah

Question

According to Sephardim, a woman is required to pray once a day. 1. On shabbat, yom tov, and rosh hodesh, does she also say musaf? 2. On shabbat, does it matter which amidah she says? (for example, if she prays in the morning, she says shaharit, and if she prays in the afternoon, she says mincha?) thanks.