Unless you've been taught otherwise in your first year, the usual way to do this is similar to the A-Level method where you combine %age or fractional errors.
In this case, the % errors are very small, so it is a good method.
eg
R is 2%
w is 1% (10/1000)
C is 1% (0.05/5.00)
The absolute error in Z2 is equal to the absolute error in R2 plus the absolute error in 1/(wC)2
The % error in R2 is 2 x %error in R
Work out the absolute error in R2 from this % error
The % error in (1/wC)2 is 2 x (% error in w plus % error in C)
From that find the absolute error in (1/wC)2
Add those 2 absolute errors together as in step 1, to find the absolute error in Z2
Can you do the rest (absolute error in Z) yourself?