$(20$ pes$)$ Given the following function, $F=(AB)(A^{\text{'}}B),$ find the time periods at whigh hazards occors and describe: which type of hazard it is$.$ Assume $B=1$ all the time and $A=6$ from $0$ ns to $40ms,A=1$ from $40$ ms to $80ms,A=0$ from $80$ ms to $100$ ms$,$ and $N=1$ for the rest of the time. Nete; Each gate lims a propogation delay of $10$ ms