Type of random variables

If the variance of the random variable X is 5 ,then variance of the random variable -3X is

If the variance of the random variable X is 9 the S.D .of the random variable -4X+8 is

The probability of a random variable X is given below Determine the value of k

A random variable X takes the values 0,1 and 2 .If P(X=1)=P(X=2) and P(X=0)=0.4 ,then the mean value of the random variable X is

A die is rolled .IF X denotes the number of positive divisors of the outcome then the range of the random variable X is