$1.$find out the $1\text{'}$s and $2\text{'}$s complement of the following numbers:

a$)11000111$

b$)11010111\mathrm{.}11$

c$)011011101\mathrm{.}110$

d$)1111000011$

Draw a block diagram of a digital computer.

Write down the Min$-$terms and Max$-$terms of $3-$variables.

Explain J$-$K$-$flip flop with logic diagram and function table.

Simplify the Boolean function $f(x,y,z)=(3,4,5,7).$

Write down $5$ differences between combinational and sequential circuit.