A die is thrown 6 times. If "getting an odd number" is a "success", what is the probability of (i) 5 successes ? (ii) atmost 5 successes? OR The random variable $X$ has a probability distribution $P(X)$ of the following form, where '$k$ ' is some number. $P(X=x)=\begin{cases} k & \text{if } x=0 \\ 2k & \text{if } x=1 \\ 3k & \text{if } x=2 \\ 0 & \text{otherwise} \end{cases}.$ Determine the value of ' $k$ '.