4 In each of the following cases choose one of the statements
$$\mathrm { P } \Rightarrow \mathrm { Q } \quad \mathrm { P } \Leftrightarrow \mathrm { Q } \quad \mathrm { P } \Leftarrow \mathrm { Q }$$
to describe the complete relationship between P and Q .
- P: \(x ^ { 2 } + x - 2 = 0\) Q: \(x = 1\)
- \(\mathrm { P } : y ^ { 3 } > 1\) Q: \(y > 1\)