To evaluate the double integral $\int_{0}^{8}(\int_{(y/2)}^{y/2+1}(\frac{2x-y}{2})dx)dy$ , we make the substitution $u=(\frac{2x-y}{2})$ and $v=\frac{y}{2}$  The integral will reduce
1. $\int_{0}^{4}(\int_{0}^{2}2udu) dv$
2. $\int_{0}^{4}(\int_{0}^{1}2udu) dv$
3. $\int_{0}^{4}(\int_{0}^{1}udu) dv$
4. $\int_{0}^{4}(\int_{0}^{2}udu) dv$