When I did our mock back in January, I found the timings really hard as well! For our listening questions on pop music, area of study B, and twentieth century, area of study E, I found that we had like 5 minutes for the longer answers that were 5 marks. But then at the end for the symphony essay there was so much extra time and my whole class finished it with like 15 minutes to spare? You're not the only worried about the timings, believe me.