Habitable zone? Using the radius and T_eff in the paper, I get a luminosity of 0.8 times solar. Accounting for eccentricity, the equivalent distances of planets c and d scaled to our solar system are 0.6 AU and 2.1 AU. A planet that's hotter than Venus or one that receives only half as much energy as Mars, take your pick...
And they're gas giants anyway.