WIP: a shity pic is added, change that

Change-Id: Iddb2818ccfcc7dd387bb9997dc9df0a0aa09666c
WIP: rm violaWells metric

Change-Id: Idf78bd42a60928fabe83230d64523b3cc9801f93
WIP: change the shity pic again

Change-Id: Ieb9a53c4afb81a05fdf5e1eec4d0369ee43784e5
WIP: change the result diagrams of ex4

Change-Id: I4de9541479c5dd819a3bb1f41093094fff29e21b