While Ishmael is preparing his tax return, he comes across two Form 1099Rs: one that includes a distribution of $12,000 that is fully taxable, and one that reports a distribution of $8,000 that is not taxable. What amounts should he report on Form 1040, Lines 4a and 4b? $12,000 and $-0- $20,000 and $8,000 $20,000 and $12,000 $8,000 and $-0