help me please. thank you

1. Juan and Pedro borrowed Php150,000 from Ana, Lorna, and Fe in solidum. Eventually, Ana validly condones or disregards the debt in the amount of Php100,000 as she feels indebted to Juan and Pedro for their parents' benevolence when both of her parents died in an accident since Juan's and Pedro's parents provided moral and financial support to Ana after the tragedy. a. What kind of obligation is involved in the problem? b. What is the effect of Ana's act of condoning the debt in the amount of Php100,000 with respect to Juan's and Pedro's debt? With respect to Lorna's and Fe's credit? 2. William and Harry obliged themselves to deliver to Elizabeth a bullet-proof car on her birthday. William and Harry agreed in front of Elizabeth to contribute the amount that will be used to buy the car. However, Harry failed to give his contribution to the purchase price of the car, hence, the car was not delivered to Elizabeth on her birthday. a. What kind of obligation is involved in the problem? b. What should Elizabeth do