A and B are solitary debtors of C, D, E, and F, joint creditors to the amount of P100,000.
a. C may demand P12,500 from A;
b. D may demand P25,000 from B
c. E may demand P50,000 from A; E will give C, D, and E P12,500
d. F may demand P100,000 from B; F will give C, F, and E P25,000 each