Graphical Evaluation of Continuous Time Convolution

Define $x(t) = e^{-5t}u(t)$ and let $y(t) = x(t)*2\delta(t-3)$ where $u(t)$ is the unit step function and $\delta(t)$ is a unit impulse. Find $y(t)$

Suppose $h(t) = u(t)$ and $x(t) = u(t-1)$ where $u(t)$ is the unit step function. Find $v(\tau) = h(5-\tau)x(\tau)$.

Suppose $h(t) = u(t)$ and $x(t) = u(t-1)$ where $u(t)$ is the unit step function. Find $w(\tau) = h(\tau)x(4-\tau)$.

Let $h(t) = u(t)$ and $x(t) = e^{-2t}u(t)$ where $u(t)$ is the unit step function. Define $y(t) = x(t)*h(t)$. Select all of the answers that are true below.

Let $x(t) = \left\{ \begin{array}{cl} 1, & 0 < t < 2 \\ 0, & \mbox{otherwise} \end{array} \right.$ and $h(t) = \left\{ \begin{array}{cl} -1, & 0 < t < 5\\ 0, & \mbox{otherwise} \end{array} \right.$. Define $y(t) = x(t)*h(t)$ and select all of the true statements below.