Return the parameters
to call a sharkfin function to model
a single round of bednet.
     
    
    Usage
    show_bednet_profile(d_50, d_shape, clr = "black", add = FALSE)
 
     
    
    Arguments
- d_50
 
the half-saturation parameter
 
- d_shape
 
the shape parameter
 
- clr
 
the line color
 
- add
 
if TRUE, add to an existing plot