b$.(2$ marks$)$ Describe the steps to convert $3$AC to a base $10$ number.

c$.(4$ marks$)$ Convert the binary number $11101101$ to hexadecimal.

d$.(1$ mark$)$ Convert $30$ stadia to metres, given that a stadion is about $157\mathrm{.}7$ men

$2.$ Find y if $14\%$ of $65=37\%$ of y $($K$/$U $-2$ marks$)$