The incremental model of software development is ________.
In the spiral model of software development, the primary determinant in selecting activities in each iteration is ________.
The cyclomatic complexity metric provides the designer with information regarding the number of ________.
Let a random variable \( X \) follow Poisson distribution such that \( P(X = 0) = 2P(X = 1) \). Then, P(X = 3) = ______
The probability distribution of a random variable \( X \) is given as follows. Then, \( P(X = 50) - \frac{P(X \leq 30)}{P(X \geq 20)} \) =