Thank you, Thomas. And good morning, everyone. I will now review our financial highlights from the fourth quarter and full year. As Thomas mentioned, in the fourth quarter, we began recognizing revenue on our Hybrid Ex Powertrain solution and we've recorded $200,000 in revenue. We continue to invest in R&D in support of our product development roadmap. In the fourth quarter, R&D spending was $17.4 million, down $800,000 sequentially and up $12.9 million year-over-year. For the full year 2021, R&D spending totaled $58.3 million compared with $12.6 million in 2020. SG&A spend, which included the expansion of key infrastructure for our commercialization initiatives and operations was $9.2 million in the fourth quarter, up $500,000 sequentially and up $3.3 million year-over-year. For the full year 2021, SG&A spend totaled $35.3 million, compared with $9.6 million in 2020. Operating expenses for the full year 2021, totaled $93.6 million, compared with $22.2 million in 2020, as our product development and company expansion gained momentum. Overall, Hyliion reported a net loss from operations of $29.1 million for the fourth quarter, compared with a net loss from operations of $26.8 million in Q3 and a net loss from operations of $10.3 million in Q4 of 2020. For the full year 2021, the company reported a net loss from operations of $96.1 million, compared with $22.2 million in 2020. Turning to the balance sheet. We ended the fourth quarter with over $557 million available to fund our commercialization plans for both the Hybrid eX and the Hyper truck ERX. This figure includes $258.4 million in cash and cash equivalants, $118.8 million in short-term investments and $180.2 in long-term investments. Our short-term and long-term investments are high-quality credit instruments with no maturities beyond 36 months and a weighted average maturity of 14 months across our portfolio. Our long-term investments are designed to preserve capital, while providing liquidity to meet the companies operating requirement. Turning to our outlook for 2022, we expect to generate revenue in the range of $2 million to $3 million in Hybrid eX sales. The actual amount of revenue recognized will be dependent upon the number of units we sell and the type of trucks and use case of the trucks that we install the Hybrid eX system in. We expect full year operating expenses to be between $135 million and $145 million, driven primarily by an increase in R&D cost to support commercialization of the Hypertruck. Beyond 2022, we expect to remain well-capitalized through the key development milestones we have discussed on today's call. With that, we will open the call to Q&A. Operator, please go ahead.