If a Boeing $777-200$ER is loaded to its maximum design take$-$off weight, which of these two

conditions would imply a larger penalty in terms of required runway distance $($and explain your choice$)$:

a$.$ An increase in temperature by $27F$ above standard, or

b$.$ A drop in pressure from standard to $27\mathrm{.}84"$ Hg $($You will need to calculate the corresponding

altitude change to the drop in pressure$)?$