questions 4,5, and 6 please and thank you

4. In radical reactions, termination steps are exothermic, yet propagation steps can be endothermic. Despite this energetic difference, propagation steps can compete successfully to continue the chain reaction, resulting in eventual product. Explain. 5. Predict the product of the following reaction and draw the mechanism for its formation by a free radical chain reaction. Clearly indicate initiation and propagation steps; show one possible termination step. 6. Draw the products of the following reaction; indicate major and minor products