I failed to understand and to visualize the following questions:

(A little help would be thankful...)

- A fair die has its 4-spot changed to 5-spot and its 2-spot changed to a 3-spot. Find the probability of getting an even number when the altered die is rolled.

My assumption here is that it probably won't change the probability before it was altered since it is a fair die and that it has equal chances. (But I was wrong). Then in the end, I might not actually understood the part where it changes spot.

- A bag contains 5 red cubs and 3 black cubes. Three cubes are chosen at random. Find the probability of at least 2 reds being chosen, given that the first cube was red: i.) if the cubes are replaced after each draw ii.) if the cubes are not replaced after each draw.

I'm not really sure what they meant by 'given that the first cube was red'