Revert "Plot 4.png"

This reverts commit cfe286a31f11501e861a338f26d6e5612ec86148.
Revert "Plot 3.png"

This reverts commit f4f0b793a6425058565a9e82f81f5784539b4c80.
Revert "Plot 2.png"

This reverts commit 6da3e9bb174c8f78da43e8cdce50a9310d69e46b.