$3\mathrm{.}0$ Convert decimal $+1687$ and $+14282$ to binary, using signed$-2\text{'}$s complement representation

and enough digits to accommodate the numbers. Then perform the binary equivalent of

$(+1687)+(-14282),(-1687)+(+14282),$ and $(-1687)+(-14282).$ Convert the answers back to

decimal and verify that they are correct.

$4\mathrm{.}0$ The following numbers are represented in signed $2-$s complement. What is their value in

decimal?

a$.101010011001$

b$.010111011010$

c$.010111101101$

d$.111111111111$

$5\mathrm{.}0$ What are the decimal equivalents of the following values $($assume positional notation and

unsigned integer formats$)?$

a$.{11101100}_7$

b$.{11011100}_4$

c$.{11001110}_3$

d$.{11001101}_6$