Indicate Whether Each of the Following Descriptions Better Matches the Rough

Short Answer

Indicate whether each of the following descriptions better matches the rough (R) or the smooth (S) endoplasmic reticulum (ER). Your answer would be a five-letter string composed of letters R and S only, e.g. SRSRR.
( ) It mostly has a tubular appearance.
( ) It contains the transitional ER.
( ) It is coated by ribosomes.
( ) It can be specialized for functions such as detoxification and lipid metabolism.
( ) Sarcoplasmic reticulum in muscle cells is one of its specialized forms.