- please provide correct solutions only- If unsure, please do not answer as this leads to a lot of confusion

A toy curt conects of a 1.0-kg wooden block and four solid rubber wheels, 250 g each, The cart is released from rest near the top of an inclined board, 50 om above the ground, and roll's down as shown in the diagram. The speed of the cart at the bottom of the board is T 50 cm /1 mark O a. 2.8 m/'s O b. 2.2 my/'s O a 31m/'s O d. 3.6 m/'s O e 2.6 m/s