I didn't help help for so long, can anyone help me .....? hummm

Consider the following two basis functions of a signal space, Y2(t) Yit) (25 points) 12 a. Show that the basis functions are orthonormal. (6 points) b. Suppose a binary baseband communication system uses the following two signals (s (t) and Sz(t)) to transmit its symbols, express these signals in terms of the basis functions in (a). Assume T=0.4x10-3 sec. (6 points) Sit) S2(1) 0.25mV -0.25mV c. T/2 T -0.25mV 1 Draw the optimum correlator receiver, and determine the threshold for the baseband communication shown in (b). (6 points) d. If the single-side noise power spectral density No=10-12 watts/Hz, find the probability of symbol (bit) error of the receiver in (c). (7 points) Consider the following two basis functions of a signal space, Y2(t) Yit) (25 points) 12 a. Show that the basis functions are orthonormal. (6 points) b. Suppose a binary baseband communication system uses the following two signals (s (t) and Sz(t)) to transmit its symbols, express these signals in terms of the basis functions in (a). Assume T=0.4x10-3 sec. (6 points) Sit) S2(1) 0.25mV -0.25mV c. T/2 T -0.25mV 1 Draw the optimum correlator receiver, and determine the threshold for the baseband communication shown in (b). (6 points) d. If the single-side noise power spectral density No=10-12 watts/Hz, find the probability of symbol (bit) error of the receiver in (c). (7 points)