Ch 2 Exercise 2 Question 3 Part(a) the first curve's color is "white"

[ExodusG0d]

it's invisible in a white theme
maybe the y-lab should't be MSE since there are five different curves on the plot?

[ExodusG0d]

What i mean is that maybe it's better to have the main = "Different Parts of Error" or something like that.
I prefer to regard MSE as a comprehensive measurement of total error