How many distinct signals would appear in the (proton-decoupled) ¹³C NMR spectrum of 2,4-dimethylpentane?

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2,4-Dimethylpentane has three types of chemically non-equivalent hydrogen environments: the methyl groups at the ends of the molecule (which are equivalent to each other), the methyl groups on carbon 2 and 4 (which are also equivalent to each other), and the methylene group in the middle of the chain. This results in three distinct signals in the NMR spectrum.

How Many Distinct Signals Would Appear in the (Proton-Decoupled) 13C

How Many Distinct Signals Would Appear in the (Proton-Decoupled) ¹³C