use probability sampling method

(a) If you plan to assign a unique identifier to each house in your population, like a property ID number.Use a random number generator or a random selection process to select a random sample of houses from your list of identifiers. Then collect data on the sale prices and ages of the selected houses. What probability sampling method is used in this case? (b) If you plan to select every nth house systematically from the entire population. Gather data on sale prices and ages from the chosen houses. What probability sampling method is used in this case