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Algebra and complex numbers

Can you please show me how to calculate the following with showing full workings?

(See attached file for full problem description)
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1, X = p/q (1 + 1n r)

Evaluate r when x = 0.34, p = 1.08 and q = 1.84

X = p/q (1 + 1n r) = qx/p = 1 + 1n r

2,

Z1 = 5-j4 Z2 = 4+j7 Z3 = -6-j7 Z4 = j2

Calculate giving your answers in the form a + jb the following.

a, Z4-Z1+Z2

b, Z3/Z4
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