i need answers only to D,E,F

7a. [1 mark] The line LI passes through the points A(2, 1, 4) and B(1, 1, 5). O Show that AB = 7b. [1 mark] Hence, write down a direction vector for L1; 7c. [2 marks] Hence, write down a vector equation for 1. 7d. [6 marks] 0 + Another line L2 has equation r = . The lines LI and L2 intersect at the point P. Find the coordinates of P. 7e. [1 mark] Write down a direction vector for L2. 7f. [6 marks] Hence, find the angle between LI and L2