11. (a) A television antenna transmits an electromagnetic wave of frequency 219.5 MHz. Calculate the wavelength of the electromagnetic wave. (3 marks) (b) The map below shows television antenna X in a small city, television antenna Y in a country town, and a location, P Antenna X transmits a horizontally polarised electromagnetic wave. Antenna Y transmits a vertically polarised electromagnetic wave, The waves from X and Y are transmitted at the same time and have the same wavelength. Ex (The map is drawn to scale] (1) State which wave (the wave transmitted from X or the wave transmitted from Y) reaches P first, (1 mark) (h) Explain why the wave transmitted from Y is polarised at right angles to the wave transmited from X (2 marks]