Answer
We can construct this baryon using three up quarks.
Work Step by Step
Note that the baryon number of each of these three quarks is $+\frac{1}{3}$
We must use exactly three quarks since the baryon number of a baryon is $+1$
If the strangeness of the baryon is $0$, then there must be zero strange quarks
The strange quark $s$ has charge $-\frac{1}{3}$, strangeness $-1$, and baryon number $+\frac{1}{3}$
If the charge of the baryon is $+2$, then there must be three up quarks
The up quark $u$ has charge $+\frac{2}{3}$, strangeness $0$, and baryon number $+\frac{1}{3}$
Therefore, we can construct this baryon using three up quarks.
