A box is cubical with sides of proper lengths \( L_1 = L_2 = L_3 = 1.8 \, \text{m} \), as shown in the figure below, when viewed in its own rest frame. This block moves parallel to one of its edges with a speed of \( 0.93c \) past an observer.**Diagram Description:**The diagram shows a cube with sides labeled \( L_1 \), \( L_2 \), and \( L_3 \).---**Questions:**(a) What shape does it appear to have to this observer?- [X] rectangular- [ ] pyramidal- [ ] cubical- [ ] spherical(b) What is the length of each side as measured by this observer? (Assume that the side that the block is moving parallel to is \( L_1 \).)- \( L_1 = \) _____ m- \( L_2 = \) _____ m- \( L_3 = \) _____ m(c) A cube of steel has a volume of \( 3.00 \, \text{cm}^3 \) and a mass of \( 6.00 \, \text{g} \) when at rest on the Earth. If this cube is now given a speed \( u = 0.93c \), what is its density as measured by a stationary observer?- _____ g/cm\(^3\)

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