please answer it

EXAMPLE 1: X in consideration of Rs. 5,00,000 from Y agrees to murder Z while borrows the money from K who knowingly lends money to Y can K recover this amount. Q1: Is this a contract yeso discuss the above case as lawyer giving logical arguments from the content you studied relevant to topic? Example 2: A and B are friends. B treats A during A's illness but does not accepts payment from A for the treatment and A promises B's son X to pay him Rs. 1000. A being poor is unable to pay. X sues A for the money can X recover. Q 2: What is the type or nature of contract in above example, can X sue A yeso giving logical arguments from the content you studied relevant to topic? Example3: Harish says in conversation to Suresh that he will give Rs. 10,000 to a person who so ever marry his daughter. Alok marries Harish daughter and files the suit to recover Rs. 10,000. Q3: Will Alok succeed yeso giving logical arguments from the content you studied relevant to topic