Convert the following decimal numbers to 5-bit two’s complement binary numbers and subtract them. Indicate whether or not the difference overflows a 5-bit result.
(a) 9₁₀ − 7₁₀ 
(b) 12₁₀ − 15₁₀ 
(c) −6₁₀ − 11₁₀ 
(d) 4₁₀ − 8₁₀