The \(x\) component of the velocity of a car changes from \(-10 \mathrm{~m} / \mathrm{s}\) to \(-2.0 \mathrm{~m} / \mathrm{s}\) in \(10 \mathrm{~s}\). (a) Is the car traveling in the positive or negative \(x\) direction? (b) Does \(\Delta \vec{v}\) point in the positive or negative \(x\) direction? (c) Is the \(x\) component of the car's acceleration positive or negative? \((d)\) Is the car speeding up or slowing down?