Two dice are tossed. Find the probability that

(a)an odd number shows on the
second die,

(b)a two or a five shows on the first
die,

(c)a two or a five shows on the first
die and an odd number on the
second die.​

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?