4. Let's consider an example. Harley's Sand and Gravel Pit has contracted to provide topsoil for three residential housing developments. Topsoil can be supplied from three different "farms" as follows: To: From: Project #1 Project #2 Project #3 Supply Farm A 4 2 8 100 Farm B 5 1 9 200 Farm C 6 3 200 Determine the transportation plan to minimize the total transportation cost by using: a. Vogel's Approximation Method (VAM) for initial basic feasible solution b. North West Corner Method (NWCM) c. Least Cost Method (LCM)