Please answer all parts including ray diagram

ROBLEM 4A: (12 pts) A concave mirror has a radius of curvature of 8 cm. Where should a 2 cm tall object be placed to produce an inverted image of twice the size? Both calculations and a ray diagram should be used to clearly support your answer. (Note: Diagrams should be to scale.). Circle: Real / Virtual do = PROBLEM 4B: (10 pts) A spring and a simple pendulum, each with mass 1kg, are oscillating at the same frequency. Calculate the ratio of their periods (end na / Ispr if the mass attached to each is changed to 4 kg? Ratio =