Need answer of this

[sunny5679]

Hi is anybody can solve this
An aircraft flies the following true RL tracks and distance in NM in succession
000 deg. 600 nm 090 deg 800 nm 180 deg.600 nm 270deg 800 nm
and arrives back at its starting place. The latitude of the starting point must be.
85 deg. N / 85 deg S / 5 deg S / 5 deg N

thanks