Estate Planning and Taxation?

The trustee of a trust makes a $5,000 charitable contribution out of trust income during the 2009 tax year per the dictates of the trust agreement. The trust agreement is silent as to the specific type of income which should be used to pay the contribution. The trust has $4,000 of taxable income and $6,000 of tax-exempt income during the 2009 tax year. How much of the $5,000 charitable contribution is deductible on the trust’s 2009 federal income tax return?