d$.(5$ points$)$ Given the dwell length from $"$c$,"$ calculate the pulsewidth and assume a pulse compression ratio of $100$:$1$ to then calculate the length of a range cell. With a PFA of ${10}^{-6},$ how many false alarms would you expect per single scan? $($Remember$,$ range eclipsing impacts the number of range cells such that the radar will only process returns from the minimum or eclipsed range to $150$ km $)$

Given the answer from c is $0\mathrm{.}0154$ milliseconds