Sabrina; in 1978 I was asked if I played Badminton. Later,(1985) I was asked why the Centre of Pressure moved as angle of attack changed and why ( I failed). Later,(1994),I was asked about EPR engines how to increase the RTOW ( I failed. Later told by CX Vets that reducing EPR resulted in higher RTOW-/- Still don't get it.
Later, I found out why I would never get into CX and stopped trying.
Latest questions you pose look very straightforward.