  Here is the Python code for the PyQtGraph application with the specified plots:
```
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtGui import QImage, QPixmap
from PyQt5.QtCore import QRect
from PyQt5.QtWidgets import QGraphicsLayoutWidget
from PyQt5.QtWidgets import QGraphicsView
from PyQt5.QtWidgets import QGraphicsScene
from PyQt5.QtWidgets import QGraphicsItem
from PyQt5.QtWidgets import QGraphicsItemGroup
from PyQt5.QtWidgets import QGraphicsItem
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from PyQt5