What kind of obligations are the following?

a. A and B are jointly and severally liable to pay the amount P10,000 to C. b. D and E are liable pro rata to C the amount of P60,000. c. Marco is obliged to construct a building for Ana within a period of two months. They agreed that Marco shall pay Ana P1000 for every day of delay. d. I will give you a cellphone when my means permit me to do so. e. I promise to give you P5,000. f. I will buy you a cellphone if you pass your examination. g. B is obliged to give a coach bag, MK wallet or a smart watch to L. h. May is obliged to give a Kate Spade cross body bag to Kaye with the agreement that Kaye may deliver a Furla bag to May. i. I promise to give Marie P2000. j. I will give you a box of chocolates if you win the game