Using $1\text{'}$s complement arithmetic and assuming $8-$bits including sign bit perform: $(30{)}_{10}-(25{)}_{10}$

Calculate the followings:

$1\text{'}$s Complement for $(30{)}_{10}=$

$1\text{'}$s Complement for $(-25{)}_{10}=$ Sum $=(,{)}_2$

What is the result in signed magnitude?