7. Consider the following relations from domain to codomain where a rule is stated that maps a given element of domain into codomain. State whether each of them is a function. Determine if the functions are 1-1 and onto. i) Domain: Integers. Codomain: Real numbers. F(x)= 2.0 * (x). ii) Domain: Integers. Codomain: Integers. F(x)= 2.0 * (x). iii) Domain: Real numbers. Codomain: Integers. F(x)= Ceiling(x). iv) Domain: Real numbers not exceeding r. Codomain: Real numbers. F(x)=\(r2 x2). R is a given positive integer. v) Domain: Real numbers not exceeding r. Codomain: Positive Real numbers. F(x)=\ (p2 x2). R is a given positive integer. vi) Domain: Integers. Codomain: N. F(x)= absolute (x)