Part $1)$ Make a sodium hydroxide solution

A student measured $4\mathrm{.}03$ grams of NaOH in a tared weigh boat. They then dissolved it into approximately $200mL$ of deionized water in a beaker. Once it was completely dissolved the student poured the solution into a $500\mathrm{.}0mL$ volumetric flask. The student rinsed the beaker with deionized water and added the rinse water to the volumetric flask. They repeated with process, adding the rinse water to the volumetric flask again, they mixed this thoroughly. Finally, they filled the volumetric flask with distilled water, mixing and then waited for the solution to reach room temperature before topping off the solution.

A$)$ Calculate the theoretical molarity of the NaOH solution.