যদি z1 = 1 - 2i, z2 = 1 + i এবং z3 = 3 + 4i হয়, তাহলে \(\left| {\left( {\frac{1}{{z_1}} + \frac{2}{{z_2}}}\right)\frac{{z_3}}{{z_2}}} \right| \) এর মান কত?
1
\(\frac{\sqrt7}{2}\)
2
\(\frac{\sqrt5}{2}\)
3
\(\sqrt \frac{45}{2} \)
4
\(\frac{\sqrt{15}}{2}\)