Spherically symmetric Electric field, in a region, is given as

vec$(E)(r,,)=(7r{}^2)hat(r)+(8{}^2)hat()$

Find the potential difference, $V_A-V_D$

Use the path: $A(2,\frac{}{2},0)B(5,\frac{}{2},0)C(5,\frac{}{2},\frac{4}{9})D(5,\frac{2}{7},\frac{4}{9})$

a$)\frac{45{}^4}{98}$

b$)\frac{40{}^4}{243}$

c$)\frac{20{}^4}{49}$

d$)\frac{400{}^4}{243}$

e$)\frac{80{}^4}{81}$