Add two signed 4-bit integers 5 and 6, what result (also a 4-bit signed integer) will be produced?

Add two signed 4-bit integers 5 and 6, what result (also a 4-bit signed integer) will be produced? 3 6 O7 9 11 12 13 14 15 16 O -1 O -3 O -7 O -9 O -10 O -11