What is the answer help im having a mental breakdown

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?