Your question is Forward Price with Convenience Yield. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Spot gas price is S₀ = 35 €/MWh, the continuously compounded risk-free rate is r = 4%, the convenience yield is y = 1.5% (continuous), and the 1-year storage cost is U = 1.20 €/MWh paid today; calculate the theoretical 1-year forward price.