On a standard die with six faces, each face contains a different number from 1 through 6. Jake has a non-standard die with six faces, and each face on Jake’s die contains an expression with a different value from 1 through 6. In no particular order, the six expressions are a + 1, 2a – 5, 3a – 10, b + 8, 2b + 5 and 3b + 10. If a and b are integers, what is the value of the product a × b? 2 points