Considering the departmental interactions based on the activity relationship chart provided, you need to:

a$.$ Construct the relationship diagram.

b$.$ Develop a block layout using the graph$-$based method.

c$.$ Propose two departments to be swapped to achieve a better block layout and explain your reasoning of selecting these two.

Notes:

For block layout, resolve any scoring ties by alphabetical order $($e$.$g$.,$ choose C over E if tied; select ABE over AGE if their scores are the same$).$

Assume all departments are of equal size.

Please help to my facility planing course, make it on paper and please do not use AI$.$