Triangle GHI is similar to triangle JKL. Find the measure of side LJ. Round your answer to the nearest tenth if necessary. Figures are not drawn to scale.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.