What is the ruling on one who combines the Dhuhr and Asr prayers, as well as the Maghrib and Isha prayers, every time a prayer is missed due to fatigue and illness, and what is the number of rak'ahs for the Friday prayer?

A Muslim must observe prayer at its appointed time, for it is the pillar of Islam. It is not waived as long as one is conscious, and a sick person prays to the best of their ability. Laziness in prayer is a characteristic of hypocrites, and Allah has warned the lazy with woe. One who delays prayer beyond its time without a valid excuse, their prayer is like the prayer of a hypocrite. If one forgets it or sleeps through it, they must make it up immediately upon remembering or waking up. It is permissible to combine Dhuhr and Asr, and Maghrib and Isha, either by advancing or delaying, due to an excuse such as travel, rain, or illness, while maintaining the full number of rak'ahs. However, when traveling, the four-rak'ah prayer is shortened to two, and Fajr is prayed at its appointed time.