Probability help (this is driving me nuts) #3

I have been at this for 3 days already and i did some of them but i just am so confused that my brain hurts even trying to figure out if i am doing the right stuff. please please help me/ show me or point me in the right direction with these problems

1.English and American spellings are colour and color, respectively. A man staying at a

Parisian hotel writes this word, and a letter taken at random from his spelling is found to be a vowel. If

40 percent of the English-speaking men at the hotel are English and 60 percent are Americans, what is the

probability that the writer is an Englishman?

4. Three missiles are fired at a target and hit it independently with probabilities 0.6, 0.7, and

0.8, respectively. What is the probability that the target is hit?