Please help me with these problems! I am super stuck and I do not know how to solve them. I need a little guidance on them

Thanks for your help in advance!

Score: 0 of 1 pt 2 of 5 (0 complete) 14.4.13 Find the length of the following two-dimensional curve. r(t) = (7 sint - 7t cost,7 cost+ 7tsin t) , for Ost=> L =_ (Type an exact answer, using x as needed.) Enter your answer in the answer box and then click Check Answer. AD ALL_........ ., .. . r" ' .-. _ '- __...r._.-, - 14.4.11 Find the length of the following two-dimensional curve, r(t): {10cost,105in ' for Data: The length ofthe curve is , (Type an exact answer, using II: as needed) Enter your answer in the answer box and then click Check Answer. All parts showing Clear All Score: 0 of 1 pt 4 of 5 (0 complete) 14.4.23 For the following trajectory, find the speed associated with the trajectory and then find the length of the trajectory on the given interval. r(t) = (3+3, -+3, 6+3), for Ost= 4 The speed associated with the trajectory is (Type an exact answer, using radicals as needed.) Enter your answer in the answer box and then click Check Answer. 1 part remaining Clear AllScore: 0 of 1 pt 4 3 of5 (CI complete) v 14.4.15 Find the length of the following threedimensional curve, rm: (6+2L5-71,-7+4|),f0r15t53 L: (Type an exam answer, using radicals as needed) Enter your answer in the answer box and then click Check Answer. All parts showing ClearAll