please show your work

I Jared has a demand for good X that has the following form: Qx = 100 ZPx + 10'5, Where Px is the price of X and I is Jared's income. Suppose initially price of good X is 40$ andJared's income is 100$. For funding a public project governments needs to impose taxation, and each citizen's contribution would be 19$. There are two options: a Lump-sum tax or a unit (excise) tax. a. HOW much the unit tax should be to gather equal amount of revenue as lump-sum tax