P is a point 22m due east of a fixed point O and Q is a point 14m due south of O. A particle A starts at P and moves towards O at a speed of 4m/s while a particle B starts at Q at the same time as A and moves towards O at a speed of 3m/s.Find an expression for the distance between A and BHence, find the value of t when the distance between A and B is a minimum and find this minimum distance.tseconds after the start.

i can't figure out how to relate them and make an expression.

i think i can do the latter part once the expression is found.