help with computer science. i dontt need the answer to the example. example is just there for help. i need the answer to the following. Convert $f=-29\mathrm{.}8$ to QII$\mathrm{.}4$

Example: Convert $f=-3\mathrm{.}141593$ to $Q3\mathrm{.}12$

Calculate $f{2}^{12}=-12867\mathrm{.}964928$

Round the result to an integer, round $(-12867\mathrm{.}964928)=12868$

Convert the absolute value to binary $16-$bit: $12868={0811}_{801}{}_{0}810{}_{}10{}_2$

Find the I$6-$bit two's complement: $110{}_1{1101}_{1011}{?}_{110}{}_2$

Organize into Q$3\mathrm{.}12$:$1100\mathrm{.}1101\_1011\_1106,$

Final result in Hex $CDBC$

Error: $\frac{12868}{2^{12}}-f=8\mathrm{.}5625{10}^{-6}$