can someone explain how to do this problem, i got the first part correct but i dont understand how to get the area exactly. THanks!

Consider the points below.P(1, 0, 0),Q(0, -2, 0),R(0, 0, -3)

(a) Find a nonzero vector orthogonal to the plane through the pointsP,Q, andR.

Enter a number.

6i+ Enter a number.

-3j+ Enter a number.

-2k

(b) Find the area of the trianglePQR.

Enter an exact number as an integer fraction or decimal.

3

NVM I FIGURED IT OUT THANKS FOR LOOKING AT IT!!