Good. Glad everything is clear.
I'm also sure that after completing the rather easy exercise you have figured out what chords are Major and what ones are minor. It seems you already understand that the chord build on the scale degree vii is diminished. To clarify, the diminished triad is consists of two minor thirds, B-D(minor 3rd) and D-F(minor 3rd) creating the diminished 5th B-F(Tritone).
In review of chords build from the Major scale, I had created a list that identiys the quality of each chord.
I - Major
ii - minor
iii - minor
IV - Major
V - Major
vi- minor
vii' - diminished (the punctuation ' is added in place of the degree circle that accompanies the roman numeral of the diminished chord. We will go into this more in later lessons)
You next exercise is to build chords on all the scale degrees from the Major scales of Eb, B, Gb, A. You can use Finale in the same for this exercise just as you did for the first one.
If there is anything that is unclear let me know.
