Can someone answer question number 7 with explanation ❤️

Find the maximum value of p= 4x + 5y subject to the following constraints :

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.