Well, since you didn't include the excerpts, I cannot possibly know which ones you are referring to, but overall, Dickinson used iambic tetrameters and iambic trimeters in this poem.
The correct way of matching each statement with the appropriate tone is the following:
* Angry tone: the adjective “annoying” implies the angry tone of the speaker. (A cell phone can be annoying when you forget to turn on the silent feature before going to sleep)
* Accepting tone: the speaker acknowledges the problem with the battery, yet she/he accepts it by carrying a charger as a solution to it. (The problem is that the battery doesn’t last long, but I don’t mind carrying a charger)
* Objective tone: the speaker is objective by stating only facts about the device. (The cell phone makes calling convenient from all possible locations)
* Sentimental tone: the verb “cherish”, and the noun “gift” imply the sentimental tone of the speaker. (I will always cherish my first cell phone because it was a gift from my dad)
* Optimistic tone: the speaker has an optimistic tone, as she/he speaks about a possible future development. (I think we can soon expect a technology that charges phones in seconds)
I have to use process of elimination here because as much as Lord Byron is a wonderful wordsmith, Don Juan can be so very confusing to me at times. No matter, here we go:
The Peter Bell The Third quote is "criticises the subject for having abundant knowledge of the world but low self-awareness". A few clues; "all things he seemed to understand" and then "but his own mind... was a mist".
The first Don Juan quote is "criticises the subject for confusing his audience". This one was harder, but the clues here are: "I wish he would explain his explanation". This seems to suggest the audience is confused.
That leaves the final Don Juan quote in the middle to be "criticises his subject for his half baked knowledge".
Hope that I could help!