MOM estimate of a Beta shape

Let $X_{1},X_{2},X_{3},X_{4}$ be a random sample of size $4$ from a distribution with the probability density function $$f(x)=\begin{cases}\alpha(\alpha+1)x^{\alpha-1}(1-x),&0<x<1,\\0,&\text{otherwise,}\end{cases}$$ where $\alpha>0$ is an unknown parameter. Based on the observed data $0.2,0.1,0.3,0.4$, the method of moments estimate of $\alpha$ equals __________ (rounded off to two decimal places)