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The table below gives information about four different crops, their different quality categories and the regions where they are cultivated. Based on the information given in the table answer the questions given below.

Type of Crops with Quality and Region

$\begin{array}{lllll} \text{Crop-1} & \Rightarrow& \text{High R1, R2, R3, R4, R5} & \text{Medium R6, R7, R8} & \text{Low R9, R10, R11} \\ \text{Crop-2} & \Rightarrow & \text{High R5, R8, R12} & \text{Medium R9, R13} & \text{Low R6} \\ \text{Crop-3} & \Rightarrow & \text{High R2, R6, R7, R13} & \text{Medium R3, R9, R11 } & \text{Low R1, R4} \\ \text{Crop-4} & \Rightarrow & \text{High R3, R10, R11} & \text{Medium R1, R2, R4 } & \text{Low R5, R9} \end{array}$

How many regions produce medium qualities of Crop-$1$ or Crop-$2$ and also produce low quality of Crop-$3$ or Crop-$4$  ______

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