please solve and explain

Dinitrogen tetraoxide and nitrogen dioxide are two gases that exist in equilibrium at a range of temperatures. NO2 is a reddish brown gas while N2O4 is colorless. At high temperature the red color is strong. At low temperature the gas has less color. If we represent the equilibrium as: 2NO2(g)N2O4(g) We can conclude that: 1. This reaction is exothermic. endothermic. neutral. More information is needed to answer this question. 2. When the temperature is increased the equilibrium constant, K : increases. decreases. remains the same. More information is needed to answer this question. 3. When the temperature is increased the equilibrium concentration of NO2 : increases. decreases. remains the same. More information is needed to answer this