Using a weighted moving average with weights of $0\mathrm{.}50($June$),0\mathrm{.}40($May$),$ and $0\mathrm{.}10($April$),$ find the July forecast.

Note: Round your answer to $1$ decimal place.

Using simple linear regression analysis, calculate the regression equation for the preceding demand data.

Note: Do not round intermediate calculations. Round your intercept value to $1$ decimal place and slope value to $2$ decimal places.

Using the regression equation in b$,$ calculate the forecast for July.

Note: Do not round intermediate calculations. Round your answer to $1$ decimal place.