2. My parents started a business of iron fittings of furniture when I was little. Their products include iron designed tables, chairs, and coat racks.
3. To do yoga helps musicians relax their muscles and strength it, and also help people to keep them in shape.
2. My parents started a business manufacturing iron fittings for furniture when I was little. Their products include tables, chairs, and coat racks.
2a.When I was little my parents started a business manufacturing iron fittings for furniture. Their products include tables, chairs, and coat racks. (this is probably more natural)
3. Doing yoga helps musicians strengthen and relax their muscles, and also helps to keep them in shape.
sentence 1 ?