
A particle of mass \(m\) falls from rest through a resistive medium having resistive force \(F=-kv\), where \(v\) is the velocity of the particle and \(k\) is a constant. Which of the following graphs represents velocity \(v\) versus time \(t\)? 


If a random variable \( x \) has the probability distribution 
then \( P(3<x \leq 6) \) is equal to