Triads and Seventh Chords

In D Minor, what roman numeral indicates raised Seventh leading tone building half step below Tonoic?

What is the resulting quality of a diatonic iii chord when built on the third scale degree in C Major?

If a piece in C major modulates to G major, what Roman numeral would represent the C major chord in the new key of G major?

Which Roman numeral represents the dominant chord in a minor key?

In a minor key, which diatonic chord functions as the leading-tone triad and typically resolves to the tonic?

When harmonizing 'Twinkle Twinkle Little Star' starting with tonic triad in C Major, what diatonically correct roman numeral should follow initial I to create strong melodic cadence at end?

When harmonizing a melody in A minor using only diatonic chords, which Roman numeral corresponds to an E7 chord?

Which diatonic chord quality does iii represent in E minor?

What is the function of the iiø7 chord in minor keys, particularly when it precedes the dominant triad or seventh?

Which diatonic seventh chord built on scale degrees of B flat Major contains all natural notes?