Determine whether each of the following functions f:ZZ is one-to-one or onto. f(x)=2x2f(x)=x3+1f(x)=x+2f(x)=2xf(x)=23x 1. Neither one-to-one nor onto 2. One-to-one but not onto 3. Onto but not one-to-one 4. Both one-to-one and onto