pleas help... the other solution on chegg is wrong

A product design team has two options for a new product: high technology and low technology. The low technology option will cost $500,000, and the probability of the product becoming obsolete in the near future is 0.4. (The probability of the product not becoming obsolete is 0.6.) The high technology option will cost $1,500,000, and the probability of the product becoming obsolete in the near future is 0.3. (The probability of the product not becoming obsolete is 0.7.) If the low tech option is selected and the product becomes obsolete, then it may be either scrapped at a cost of $150,000 or sold in a secondary market for a total revenue of $400,000. A low tech product that does not become obsolete will produce a total revenue of $800,000. A high tech product that becomes obsolete will provide a total revenue of $600,000. A high tech product that does not become obsolete will provide a total revenue of $2,200,000. Use a decision tree to determine the course of action and the resulting expected value. Show the decision tree and all your work. [12 Marks]