Score: 8.25/11 8/11 answered .Question 9 Let a = (4, 2, -2) and b = (0, -1, 2). Find the projection of b onto a. proja b = BN W 5Score: 8.25/11 8/11 answered Question 11 A father is pulling his son on a sled at an angle of 17 with the horizontal with a force of 30 lb (see the following image). He pulls the sled in a straight path of 37 ft. How much work was done by the man pulling the sled? 30 lb 17. (Round your answer to the nearest whole number.) Work = ft - lbs Question Help: Message instructor D Post to forum Submit Question MacBook Pro esc C G Search or type URL @ % & # 2 W - 4 5 W m R Y tabPart 1 of 3 This question has three parts. Answer each part correctly to get the next part. We will find a relationship between the direction cosines of a vector. Consider a general vector v =. What is the dot product v . i of 3 and the standard unit vector along the x-axis i? vi = a vo Part 2 of 3 So v . i = a. Similarly, 3 . j = b and 3 . k = c. Now, write an expression for the magnitude of 3: = 11211 What is the magnitude of i? Question Help: Message instructor D Post to forum Submit Part MacBook Pro esc C G Search or type URL @ V & # 2 3 4 5 Q W E R Y U tab