A diprotic weak base (B) has pB values of 4.167 (pB1) and 7.292 (pB2). Calculate the fraction of the weak base in each of its three forms (B, BH, BH₂²) at pH 8.049.
a. B: ? BH: ? BH₂²: ?
b. B: ? BH: ? BH₂²: ?
c. B: ? BH: ? BH₂²: ?
d. B: ? BH: ? BH₂²: ?