Question: Consider a system that multiplies a given input by a ramp function, r ( t ) = t u ( t ) . That is

Consider a system that multiplies a given input by a ramp function, r(t)=tu(t). That is, the output of the system y(t)=x(t)r(t).
a. Is the system linear? Justify your answer.
b. Is the system memoryless? Justify your answer.
c. Is the system causal? Justify your answer.
d. Is the system time-invariant? Justify your answer.
Consider a system that multiplies a given input

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