Define the ff:

3. Classification of Obligations

3.1 Pure and Conditional

a. Pure obligations

b. Conditional obligations

(i) Suspensive v. resolutory conditions

(ii) Potestative, casual and mixed conditions

(iii) Impossible conditions

c. Effects of conditions

d. Constructive fulfilment of suspensive condition 2

e. Retroactive effects of fulfillment of suspensive condition

f. Rights of creditor pending fulfillment of suspensive condition

g. Loss, improvement, deterioration of thing to be delivered pending the fulfillment of suspensive condition/resolutory condition

h. Unilateral/reciprocal obligations

i. Effect of mutual breach

3.2 Obligations with a Period

a. Suspensive period v. resolutory period

b. Effects of a period

c. When courts may fix a period

d. Benefit or use of the period

3.3 Alternative Obligations and Facultative Obligations

a. Alternative v. facultative obligations

b. Alternative prestations at debtor's choice

c. Alternative prestations at creditor's choice

d. Facultative obligations

3.4 Joint and Solidary Obligations

a. Joint obligation - presumed

b. Solidary obligation

(i) Active solidarity

(ii) Passive solidarity

c. Indivisibility does not give rise to solidarity or vice-versa

d. Solidarity with different terms and conditions

e. Prohibited acts

f. Demand by any of the solidary creditors

g. Effect of novation, compensation, confusion or remission

h. Payment by a solidary co-debtor

3.5 Divisible and Indivisible Obligations

a. Divisible obligation

b. Kinds of division

c. Obligations deemed divisible

d. Indivisible obligation

e. Kinds of indivisibility

f. Effect of non-compliance by a co-debtor in a joint indivisible obligation

g. Obligations deemed indivisible

3.6 Obligations with a Penal Clause

a. Nature, purpose and kinds of penal clause

b. Effects

c. Proof of actual damages not necessary

d. Reduction of penalty

e. Effect of nullity of penal clause

f. Effect of nullity of principal obligation on penal clause