Question $6$: can you correct it step by step please

Given the following spot direct quotes for currency pairs, determine the indirect quotes:

a$.EU\frac{R}{U}SD=1\mathrm{.}1750-1\mathrm{.}1760$

b$.US\frac{D}{J}PY=110\mathrm{.}25-110\mathrm{.}35$

c$.GB\frac{P}{C}HF=1\mathrm{.}2855-1\mathrm{.}2870$

Hint: Given this way quotes give you the bid and the ask prices.