4 marks] Determine whether each rule below describes a function with the given domain and codomain. a) f:N N where f(n)-n b) h:R ->R where h(x)-Vr c) g:N-N where g(n) any integer>n. d) F:R R where F(x) r-5 [4 marks] Determine whether each of these functions from Z to Z is injective (one-to-one) a) f(n) 4n 1 b) f(n)-3n2-1 c) fin)-n d) fin)- 1 4 marks] Determine whether each rule below describes a function with the given domain and codomain. a) f:N N where f(n)-n b) h:R ->R where h(x)-Vr c) g:N-N where g(n) any integer>n. d) F:R R where F(x) r-5 [4 marks] Determine whether each of these functions from Z to Z is injective (one-to-one) a) f(n) 4n 1 b) f(n)-3n2-1 c) fin)-n d) fin)- 1