the .32 was supposed to be the tan of 60, at least that's what the internet site I used said
.
Multiply by the groundspeed and divide by 60 was the formula for TW.
G/S x tan lat 60
However, having used a real calculator this time
, the tan lat is 1.73, so that ends up with 5.77 or 6 degrees for government work
As it is minus because you are going E, apply to the -13 for the apparent wander to get -19, subtract from 90 to get 81, answer B