Tính: \(-0,75 \cdot \left(\frac{-12}{7}\right)\), \(-2 \cdot \left(-\frac{1}{3}\right) \cdot (-4,5)\), \((-1,25) : \frac{9}{16}\), \(-\frac{5}{8} \cdot \left(-\frac{4}{\frac{1}{2}}\right)\)

help vs nhanh nhé ạ
----- Nội dung ảnh -----
BÀI 7. Tính:
a) \(-0,75 \cdot \left(\frac{-12}{7}\right)\)
b) \(-2 \cdot \left(-\frac{1}{3}\right) \cdot (-4,5)\)
c) \((-1,25) : \frac{9}{16}\)
d) \(-\frac{5}{8} \cdot \left(-\frac{4}{\frac{1}{2}}\right)\).