Please help me solve these two problems step by step for Mechanical engineering class. Thank you.

An airplane starts from an airport in city A and flies $200$ miles in the direction $35$ north of

east to city B$.$ From B$,$ the airplane then flies $200$ miles to city $C$ which is located $350$ miles

from city A in the direction $25$ west of north. Find the distance between city B and C $,$ and

the location of city C with respect to City B $.$

The work done on an object by a force $F$ when the objects is moved by displacement $d$ is

$W=F*d.$ Find the work done by force $F=3i+4j+5k$ when the object is displaced

from point $P_1(3,1,5)$ to point $P_2(-3,4,-2)$ if

a$.$ The object moves from point $P_1(3,1,5)$ to point $P_3(-3,1,5)$ and then to point

$P_2(-3,4,-2)$

b$.$ The object mover from point $P_1(3,1,5)$ to point $P_4(3,1,-2)$ and then to point

$P_2(-3,4,-2)$

c$.$ What did you learn from this problem?