5. You prepare 180 twisted LC cell using a dopant with a helical twist power HCP= -20/u. Calculate the limits of the LC thickness and the concentration of the chiral dopant, if the equilibrium pitch corresponds to the LC layer the thickness of 5u for strong anchoring at the boundaries. 5. You prepare 180 twisted LC cell using a dopant with a helical twist power HCP= -20/u. Calculate the limits of the LC thickness and the concentration of the chiral dopant, if the equilibrium pitch corresponds to the LC layer the thickness of 5u for strong anchoring at the boundaries