write in keypoard please

1. (30p.) It is planned to produce 200 toy bicycles and 100 toy cars in the 20th week of the year and 100 toy bicycles and 100 toy cars in the 21st week of the year in a toy factory. A toy bicycle requires 2 wheels and 4 kg of plastic. A toy car requires 4 wheels and 2 kg of plastic. Each wheel, whether bicycle or car, requires 500 g of plastic. Plastic is outsourced and lead time is 1 week. The wheel is produced in the factory and the production period is 2 weeks. In order to successfully produce the planned amount of toy bicycle and toy cars in the 20th and 21st week, at least how much plastic should be supplied in total in the 16th, 17th, 18th and 19th weeks? Please show the necessary calculations and draw the required tables