#premature-convergence

Question 1: Select all that apply

Which statements about selection in a genetic algorithm are true? Select all that apply.

Very high selection pressure can make the population converge too early to a suboptimal solution.1
A larger tournament size raises the selection pressure, since a weak individual is then more likely to meet a stronger one.2
A tournament of size $k = 1$ always selects the best individual of the population.3
Adding the same constant to every fitness value leaves the roulette-wheel selection probabilities unchanged.4
Adding the same constant to every fitness value does not change which individual wins a tournament.5