Investors can allocate their wealth between (i) the risk-free asset, and (ii) one of the three risky assets as shown below. For example, 20% in risk-free and 80% in A, or 30% in risk-free and 70% in B, or 40% in risk-free and 60% in C, and so on.

Risky Asset	E(r)	Stdev
A	20%	25%
B	30%	35%
C	40%	45%

The risk-free rate is 5%. If investors target an expected annual return of 30%, what is the lowest stdev that can be achieved among all the possible allocations?

Show your answer in % and round to two decimals (e.g. xx.xx%).