Refer to the following phase diagram $($not to scale!$)$ for nitrogen:

A sample of nitrogen at a pressure of $1\mathrm{.}00$atm and a temperature of $59\mathrm{.}0K$ is heated at constant pressure to a temperature of $78\mathrm{.}6K.$ Which of the following are true?

Choose all that apply

The sample is initially a solid.

The sample is initially a liquid.

The liquid initially present will solidify.

One or more phase changes will occur.

The final state of the substance is a gas.