Hint 11-75

A Fischer projection just means that you draw a line structure
with the main carbon chain oriented vertically and the groups
coming off this chain either going horizontally or vertically.
See 14.2 if you are unsure of what a Fischer projection looks like.

You are going to have to work out the priorities of the groups at
each chiral carbon and then draw the chiral centres in the steering-wheel
configuration to work out if each centre is R or S.

Note the shorthand (2S,3S) means S configuration at C2 and S
configuration at C3.