Reading probability off a piecewise CDF, including a jump

The distribution of a random variable X is given by the piecewise CDF $F(x)=0,\tfrac14,\tfrac12,\tfrac34,\tfrac{x+3}5,1$ on the successive intervals $(-\infty,0),[0,\tfrac14),[\tfrac14,\tfrac12), [\tfrac12,\tfrac34),[\tfrac34,2),[2,\infty)$. Then $P\left[\tfrac12\le X\le\tfrac34\right]$ is: