In a small pond there are 50 fish 10 of which have been tagg

In a small pond there are 50 fish, 10 of which have been tagged. Suppose that a fisherma\'s catch consists of seven fish. (assume that these seven fish form a random sample size of seven selected without replacemnt.) Let X denote the number of tagged fish that are caught. a) find the p.m.f of X b) find the expected value of X c) find the expected value of X^2 d) Find the variance of X (It would be most helpful if worked out instead of uploading a picture. I find those hard to read/follow)

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