In the context of medieval Indian administrative systems, the term Barid refers to a critical component of governance under various Sultanates, including the Delhi Sultanate. Consider the following statements regarding the role of the Barid and associated institutions:

1. The Barid was a central intelligence and communication network that reported directly to the Sultan, providing crucial information on political developments, military movements, and provincial administration.
2. The Barid-i-Mamalik, often regarded as the head of the entire Barid system, was responsible for overseeing intelligence gathering across the empire and played a key role in maintaining the Sultan's central authority.
3. The Barid system was established solely during the reign of Firoz Shah Tughlaq, as part of his efforts to enhance central surveillance and control over provincial governors.
4. The information collected by the Barid network often bypassed local governors and officials, ensuring that the Sultan received unfiltered reports on the activities of provincial rulers and nobles.

Which of the above statements is/are correct?