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Context: If the Manager has received redemption orders for 5% or more of the outstanding Units on a Redemption Date, the Manager may defer the payment of the redemption proceeds for up to 30 days following the Redemption Date. See 'Redeeming Units - How to Redeem Units'. A redemption charge may be charged on Units tendered for redemption within the first two years following their purchase as follows: Class A Units - at the rate of 2.5% during the first 3 months, 2% during months 4 through 6 and 1% during months 7 to 12. Class F and Class G Units - at the rate of 2.5% during th e first 15 months, 2% during months 16 through 18 and 1% during months 19 to 24. Any applicable redemption charge will be calculated using the higher of: (i) the acquisition cost; and (ii) the then current market value; of the Units tendered for redemption.

Question: What is the redemption charge for class F units?
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