QUESTION 6 1 points Save Answer Let Y be a random variable as follows P(Y=-6) = 0.1 P(Y=-1) = 0.2 P(Y=0) = 0.2 P( Y=1) = c then what is the value of c (give your answer to 1dp)? QUESTION 7 2 points Save Answer Let the random variable X, have the following probability density function: 3x O Sx Sk fx ( 1) = 0 otherwise for some constant k. Find the value of k which makes this a valid pmf. O a. 1 Ob. I W/NWI - OC O d. W / N