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Relations and Functions | Range of a Relation

If A = {1, 2, 3, ...., 14} and R is a relation defined on A such that R = {(x, y) : 3x - y = 0 where x, y ∈ A} then find the range of R ?
If A and B are the domain and range respectively for the relation R such that R = {(1, 3), (2, 4), (3, 5), (5,7)} then which of the following option is true ?
If A = {0, 1, 2, 3}, B = {1, 2, 3} and R is a relation from A to B such that {(x, y) : x ∈ A, y ∈ B and y = ωx where ω is the cube root of unity} then the range of R is/an ?
If A = {0, 1, 2, 3}, B = {1, - 1} and R is a relation from A to B such that {(x, y) : x ∈ A, y ∈ B and y = ix where i is the imaginary number} then the range of R is/an?
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