There are $7$ intervals between the first student and the last student. Thus, the line is $7 \times2 = 14$ meters long. 
There are $$8$$ standing in a straight line. The first student is at the start of the line, and the last student is at the end of the line. The distance between each student is $$2$$ meters. How long is the line? (Ignore the thickness of the trees.) 
Options:
[a] $8$ meters 
[b] $$11$$ meters 
[c] $$14$$ meters 
[d] $15$ meters 
[e] $16$ meters 