The fully covered premium amounts to $4,668. Next, we calculate the partially covered premium using: 25% * 9,264 = 2,316 Now, the total annual premium paid by Mr. Henderson's employer is equivalent to the sum of the completely covered premium and partially covered premium. This is: 4,668 + 2,316 = $6,984 of the Henderson family's annual premium is covered by Mr. Henderson's employer