Hi I need help with the following question, hoping you can help

Initial investment is $1,500. NPC has the opportunity to invest in a project that has a 75% chance of generating $500 per year for 7-years under good conditions or a 25% chance of generating $25 per year for 7-years. Assuming that all cash flows are discounted at 10%, if NPC chooses to wait a year before proceeding, how much will this increase or decrease the project's expected NPV in today's dollars (i.e., at t = 0), relative to the NPV if it proceeds today?