Ricardo claimed that the total energy (TE) of the system decreases as Felix falls because some energy is lost to the surroundings as thermal energy. The student drew the model below to support this claim.

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.