Write a function called echo that takes as argument a list and returns a copy of that listwith each element duplicated right after it. here are some examples of how your program should behave on python idle. > > > echo(['a','b','c'])['a', 'a', 'b', 'b', 'c', 'c']> > > echo(['x','y'])['x', 'x', 'y', 'y']> > > echo([85, 72, 61])[85, 85, 72, 72, 61, 61]> > > echo([85, "abc", 6.79])[85, 85, 'abc', 'abc', 6.79, 6.79]

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k