1- If g(x) and k(x) are two probability functions in which g(x) = 2x and k(x) = 2, select the relation between those probability functions: a- g(x) is the probability density function, and k(x) is the cumulative distribution function b- k(x) is the probability density function, and g(x) is the cumulative distribution function c- g(x) is the probability density function, d- k(x) is the cumulative distribution function 2- The variance of continuous uniform distribution function f(x) is 3 and the cumulative distribution function is given below: x