Consider the Following Transportation Problem -How Many Demand-Side Constraints Are There? Write the Demand-Side Constraints

Essay

Consider the following transportation problem:
$$\begin{array} { l r r c } \text { Source } & \mathbf { 1 } & \mathbf { 2 } & \text { Supply } \\\hline 1 & 5 & 6 & 100 \\2 & 4 & 2 & 200 \\3 & 3 & 6 & 150 \\4 & 9 & 7 & 50 \\\hline Demand& 250 & 250 &\end{array}$$
-How many demand-side constraints are there? Write the demand-side constraints.