Calculate the relative angle at the knee and the absolute angles of the thigh given the following positions in m: hip (2.000, 1.905), knee (2.122, 1.642), and ankle (1.897, 1.210). a. abs = −65.1°; rel = −52.4° b. abs = 114.9°; rel = −127.6° c. abs = 114.9°; rel = 52.4° d. abs = 24.9°; rel = 37.6°