If i have three 4's and I am trying to get a yahtzee, what is the probability of me rolling 2 more 4's on my next roll?

1/6*1/6=1/36

I have a set of three 6's, What is the probability that i roll a two of a kinda on my next roll to get my full house?

1/6+1/6+1/6+1/6+1/6+1/6=6/36=1/6

I have a 2,3,4,and a 5, what is the probability that i either roll a 1 or a 6 on my next roll so I can get a large straight?

1/6+1/6=2/6=1/3

I have a 2,3, and 4, what is the probability that i roll a 1,5,or 6 to get a small straight?

1/6+1/6+1/6=3/6=1/2

I have three 4's what is the probability that i roll a 4 on my next roll to get a four of a kind.

11/36