Study the following information carefully and answer the questions below

Six train viz. G, H, I, J, K, and L with some building materials viz. Gravel, Concrete, Glass, Insulation, Lumber and Wiring are delivered on different days starting from Monday to Sunday for construction, but not necessarily in the same order. One of the day is leave for the construction.
The train  with Wiring is delivered four days before the train H which is delivered two days after the train with Insulation. The train I delivered immediately before the train  with Insulation. The leave is planned on the day before the delivery of the train H and after the train I. The train J, which is not delivered after leave, delivers immediately after the delivery of the train with Lumber which is not delivered after the train with Wiring . The train G delivers three days before the train K which is not delivered on the last day of the week. The train with Gravel is delivered immediately before the train with Glass.