25.0 mL of 0.10 M $\mathrm{NH}{}_3$ ($K_b=1.8\times 10^{-5}$) is titrated with 0.10 M HCl. Indicator ranges: methyl red 4.2-6.3; phenolphthalein 8.3-10.0. Select the correct statements.

1. AMethyl red is a suitable indicator
2. BPhenolphthalein is not suitable
3. CThe pH at the equivalence point is about 5.28
4. DThe pH at half-equivalence is about 4.74