Use (1,570 mm²/m) top and bottom.
$(5.5 - 1.6) / 2 = 1.95 \text m$.
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Volume = 5 × 5 × 1.2 = 30 m³ Weight = 30 × 25 kN/m³ = Use (1,570 mm²/m) top and bottom
$$q_max = \fracNA \left( 1 + \frac6eB \right)$$ tower crane foundation design calculation example link
The provided link ( engineeringexamples.com/... ) illustrates an automated version of these calculations.