Sam is an accountant who is especially busy during tax season. By the end of each day he complains of shoulder stiffness and tightness, as well as some upper back pain. What might be Sam's problem, and how could he prevent the discomfort?

Incorrect posture, learn good posture habits or get ergonomical chairs

Explanation:

Incorrect posture is sitting against the appropriate posture of the body, either when writing, sleeping, eating or working. When there is a bad posture to this it affects the body system especially the spinal cord, neck, back. Incorrect posture can lead to kyphosis. One way Sam can solve this pain is by learning proper sitting or working pattern or get ergonomical chairs that assist him to sit well.

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.

nothing

hope this !