Please answer briefly.

Problem 4: As shown below, processes can be in one of three states: running, ready and blocked. There are six possible state transitions (labeled 1-6). For each label, indicate whether the transition is valid or not valid. If valid, indicate when the transition is used for a process (i.e. give an example). If the transition is not valid then indicate why. Running Blocked Ready 4 State transitions: (a) 1: Blocked to Running (b) 2: Running to Blocked (c) 3: Ready to Blocked (d) 4: Blocked to Ready (e) 5: Ready to Running (f) 6: Running to Ready