write but do not solve the set of time domain 4) NODAL equations for this circuit- до V(+) mm 20 3h 1156 403

can you explain to me why the convolution of these two sinc fucntions which are rect functions equal a rect function? I thought when you convolute a rectangle and a rectangle with two different lengths, it makes a trapezoid shape. The answer says it is rectangle funtion so my code is corrcect but i dont understand why this is true. I need a step by step solution and explanation.   here is the problem: Consider the signal x(t) = 2 sinc(6t + 3).the output y (t) = (x *h )(t) when x(t) ispassed through a filter with impulse response h (t) = 4sinc(2t -1). the matlab code was just to help me visuallize

1. Graph the following complex numbers and convert in the specified form a. 5-j7 to exponential form b. 5 cjs (-45°) to rectangular form C. -2-j3 to polar form d. 32-45° to exponential form of complex numbers, (10pts each)

Hello, I am confused on this question, the answer is attached as well but I am having difficulty with converting the complex numbers and the reasoning behind these steps. Thanks.