The average daily high temperature ((left parenthesisin ^\circ C) ∘ C)degrees, C, right parenthesis in Karachi, Pakistan, on the t^{\text{th}}t th t, start superscript, start text, t, h, end text, end superscript day of the year is approximately \qquad T(t) = 29 - 5\cos\left(\dfrac{2\pi (t- 12)}{365}\right)T(t)=29−5cos( 365 2π(t−12) )T, left parenthesis, t, right parenthesis, equals, 29, minus, 5, cosine, left parenthesis, start fraction, 2, pi, left parenthesis, t, minus, 12, right parenthesis, divided by, 365, end fraction, right parenthesis. What are the highest and lowest average daily highs in Karachi? Give exact answers.