Part 2.
Auxiliary and middle lines.

1 Remove the blocked pattern below the letter.
2 Draw tangent circles and a line through their centers as in figure "II_1". Delete the circles.
3 Select the inner curve and use the "Offset" command to draw a new curve through the point as in figure "II_2".
4 Cut it and connect the remaining short part to the outer curve.
___II_2_2___
5 Draw circles tangent to the inner and outer curves starting from the upper end of the "C".
___II_2_3___
6 Use the "Freeform / Through points" command to draw a center line through the centers of these circles. Remove the circles.
___II_2_4___
7 Trim and remove the unnecessary from the intersection of the center lines.
___II_2_5___
8 Extend the segment to the inner curve as in figure "II_3".
9 The construction of the middle and auxiliary lines is finished.

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To be continued ...