"Create a YouTube thumbnail for an audio book series titled

"Create a YouTube thumbnail for an audio book series titled '72 to 75 A History of Bangladesh Audio Book Part 1'. The design should reflect the historical period of 1972 to 1975 in Bangladesh. Include iconic imagery from that era, such as historical figures like shekih mujib, major dalim , national symbols, or significant events. The color scheme should evoke a sense of history and importance, with bold text displaying the title in Bengali. Ensure the design is visually engaging to attract viewers interested in history and politics."