The graph below describes the cycles of the Moon
as observed from Earth during the first $60$ days of a year.
The percentage of the Moon which we see varies as a function of time.
A *full moon* corresponds to $100\%$ visibility
and a *new moon* corresponds to $0\%$ visibility.
**Complete the following sentences based on the graph of the function.**
* The first new moon of the year was on day [[☃ input-number 1]].
* The second new moon of the year was on day [[☃ input-number 2]].
* Therefore, the period between two new moons is approximately
[[☃ input-number 3]] days long.
