could you help giving me explanations on this problem ?

The selected options are correct. Please tell me why.

Consider rolling a fair six-sided die six times, independently. 24. The chance that every roll gives an even number is closest to (a) 0.781% (b) 1.367 (c) 1.953% (d) 2.539% (c) 3.125% 25. The chance that three rolls show the same number and the rest show different numbers is closest to (a) 3.086% (b) 17.747% (c) 32.407% (d) 47.068% (c) 61.728%