Answer
The emotional value will be at the peak on the 7th day, and it will repeat after every 28 days. So, every 7 days will be good days with the moody boss.
Work Step by Step
For example:
On the 7th day, the emotional value is at the peak.
On the 14th day, the emotional value is neither high nor low.
On the 21st day, the emotional value is at the lowest level.
On the 28th day, the emotional value is neither high nor low.
And, on the 35th day, the emotional value is at the peak.